What does BULB mean?

Definitions for BULB

Here are all the possible meanings and translations of the word BULB.

Princeton's WordNet

  1. bulbnoun

    a modified bud consisting of a thickened globular underground stem serving as a reproductive structure

  2. light bulb, lightbulb, bulb, incandescent lamp, electric light, electric-light bulbnoun

    electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity

  3. bulbnoun

    a rounded part of a cylindrical instrument (usually at one end)

    "the bulb of a syringe"

  4. bulbnoun

    anything with a round shape resembling a teardrop

  5. medulla oblongata, medulla, bulbnoun

    lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata)

    "the medulla oblongata is the most vital part of the brain because it contains centers controlling breathing and heart functioning"

  6. bulbnoun

    a rounded dilation or expansion in a canal or vessel or organ


  1. bulbnoun

    Any solid object rounded at one end and tapering on the other, possibly attached to a larger object at the tapered end

    Etymology: From bulbe, from bulbus, from βολβός.

  2. bulbnoun

    A light bulb

    Etymology: From bulbe, from bulbus, from βολβός.

  3. bulbnoun

    The bulb-shaped root portion of a plant such as a tulip, from which the rest of the plant may be regrown.

    Etymology: From bulbe, from bulbus, from βολβός.

Webster Dictionary

  1. Bulbnoun

    a spheroidal body growing from a plant either above or below the ground (usually below), which is strictly a bud, consisting of a cluster of partially developed leaves, and producing, as it grows, a stem above, and roots below, as in the onion, tulip, etc. It differs from a corm in not being solid

  2. Bulbnoun

    a name given to some parts that resemble in shape certain bulbous roots; as, the bulb of the aorta

  3. Bulbnoun

    an expansion or protuberance on a stem or tube, as the bulb of a thermometer, which may be of any form, as spherical, cylindrical, curved, etc

  4. Bulbverb

    to take the shape of a bulb; to swell


  1. Bulb

    A bulb is a short stem with fleshy leaves or leaf bases that function as food storage organs during dormancy. A bulb's leaf bases, also known as scales, generally do not support leaves, but contain food reserves to enable the plant to survive adverse conditions. At the center of the bulb is a vegetative growing point or an unexpanded flowering shoot. The base is formed by a stem, and plant growth occurs from this basal plate. Roots emerge from the underside of the base, and new stems and leaves from the upper side. Tunicate bulbs have dry, membranous outer scales that protect the continuous lamina of fleshy scales. Species in the genera Allium, Hippeastrum, Narcissus, and Tulipa all have tunicate bulbs. Non-tunicate bulbs, such as Lilium and Fritillaria species, lack the protective tunic and have looser scales. Other types of storage organs are sometimes erroneously referred to as bulbs. The technical term for plants that form underground storage organs, including bulbs as well as tubers and corms, is geophyte. Some epiphytic orchids form above-ground storage organs called pseudobulbs, that superficially resemble bulbs.

Chambers 20th Century Dictionary

  1. Bulb

    bulb, n. an onion-like root: any protuberance or enlargement resembling such.—v.i. to form bulbs: to bulge out or swell.—adjs. Bul′bar, Bulbed, Bul′bous, Bulbā′ceous, Bulb′iform, Bulbif′erous, Bul′bose, Bul′by.—ns. Bul′bule, a little bulb: a young bulb which grows from an old one; Bul′bus, a bulb. [L. bulbus—Gr. bolbos, an onion.]

Editors Contribution

  1. bulb

    A type of product created and designed in various colors, materials, mechanisms, shapes, sizes, styles, are energy efficient and recyclable.

    The light bulbs are energy efficient.

    Submitted by MaryC on September 25, 2020  

Suggested Resources

  1. bulb

    The bulb symbol -- In this Symbols.com article you will learn about the meaning of the bulb symbol and its characteristic.

  2. BULB

    What does BULB stand for? -- Explore the various meanings for the BULB acronym on the Abbreviations.com website.

British National Corpus

  1. Nouns Frequency

    Rank popularity for the word 'BULB' in Nouns Frequency: #2976

How to pronounce BULB?

How to say BULB in sign language?


  1. Chaldean Numerology

    The numerical value of BULB in Chaldean Numerology is: 4

  2. Pythagorean Numerology

    The numerical value of BULB in Pythagorean Numerology is: 1

Examples of BULB in a Sentence

  1. Vikrant Parsai:

    You don’t have to be the brightest bulb in the house; when the darkness comes, you will be 100 watt.

  2. William H Gass:

    We have scarcely gotten home ... when our children's sneezes greet us, skinned knees bleed after waiting all day to do so. There is the bellyache and the burned-out basement bulb, the stalled car and the incontinent cat. The windows frost, the toilets sweat, the body of our spouse is one cold shoulder and the darkness of our bedroom is soon full of the fallen shadows of our failures.

  3. Eric Adams:

    You could almost see the light bulb just click on and it was ... like, 'I'm ready.' In some ways the arrest changed his life.

  4. Thomas Edison:

    There are only a handful of inventions in history that have changed the way everyone lives on a daily basis, the light bulb changed everything.

  5. Anuj Somany:

    Awakening to the people's nature for a person brings sadness and not happiness, for it is very much like glowing of a bulb from outside for others but inside own feeling the burning sensation.

Images & Illustrations of BULB


Popularity rank by frequency of use


Translations for BULB

From our Multilingual Translation Dictionary

Get even more translations for BULB »


Find a translation for the BULB definition in other languages:

Select another language:

  • - Select -
  • 简体中文 (Chinese - Simplified)
  • 繁體中文 (Chinese - Traditional)
  • Español (Spanish)
  • Esperanto (Esperanto)
  • 日本語 (Japanese)
  • Português (Portuguese)
  • Deutsch (German)
  • العربية (Arabic)
  • Français (French)
  • Русский (Russian)
  • ಕನ್ನಡ (Kannada)
  • 한국어 (Korean)
  • עברית (Hebrew)
  • Gaeilge (Irish)
  • Українська (Ukrainian)
  • اردو (Urdu)
  • Magyar (Hungarian)
  • मानक हिन्दी (Hindi)
  • Indonesia (Indonesian)
  • Italiano (Italian)
  • தமிழ் (Tamil)
  • Türkçe (Turkish)
  • తెలుగు (Telugu)
  • ภาษาไทย (Thai)
  • Tiếng Việt (Vietnamese)
  • Čeština (Czech)
  • Polski (Polish)
  • Bahasa Indonesia (Indonesian)
  • Românește (Romanian)
  • Nederlands (Dutch)
  • Ελληνικά (Greek)
  • Latinum (Latin)
  • Svenska (Swedish)
  • Dansk (Danish)
  • Suomi (Finnish)
  • فارسی (Persian)
  • ייִדיש (Yiddish)
  • հայերեն (Armenian)
  • Norsk (Norwegian)
  • English (English)

Word of the Day

Would you like us to send you a FREE new word definition delivered to your inbox daily?

Please enter your email address:

Discuss these BULB definitions with the community:



    Use the citation below to add this definition to your bibliography:


    "BULB." Definitions.net. STANDS4 LLC, 2021. Web. 27 Oct. 2021. <https://www.definitions.net/definition/BULB>.

    Are we missing a good definition for BULB? Don't keep it to yourself...

    Browse Definitions.net

    Free, no signup required:

    Add to Chrome

    Get instant definitions for any word that hits you anywhere on the web!

    Free, no signup required:

    Add to Firefox

    Get instant definitions for any word that hits you anywhere on the web!


    Are you a words master?

    sound of something in rapid motion
    • A. disjointed
    • B. busy
    • C. nasty
    • D. whirring

    Nearby & related entries:

    Alternative searches for BULB: