Princeton's WordNet

1. cadmium, Cd, atomic number 48(noun)

   a soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores

2. candle, candela, cd, standard candle(noun)

   the basic unit of luminous intensity adopted under the Systeme International d'Unites; equal to 1/60 of the luminous intensity per square centimeter of a black body radiating at the temperature of 2,046 degrees Kelvin

3. certificate of deposit, CD(noun)

   a debt instrument issued by a bank; usually pays interest

4. compact disk, compact disc, CD(adj)

   a digitally encoded recording on an optical disk that is smaller than a phonograph record; played back by a laser

5. four hundred, 400, cd(adj)

   being one hundred more than three hundred

Kernerman English Learner's Dictionary

1. CD(noun)ˈidˈi

   a plastic computer disk that contains or records information

   a music CD

Wiktionary

1. cD(Noun)

   a type of giant elliptical galaxy

• CDAfrikaans
• قُرْص مُكَثَّفArabic
• компакт дискBulgarian
• CDPortuguese (BR)
• CD (kompaktní disk)Czech
• CompaktdiskGerman
• CD; compactdiskDanish
• ψηφιακός δίσκος, σιντί (συντομογρ.)Greek
• CD, disco compactoSpanish
• CD, laserplaatEstonian
• لوح فشردهFarsi
• CD-levyFinnish
• CD; disque compactFrench
• תַקלִיטוֹרHebrew
• सीडीHindi
• CDCroatian
• CD-lemez, CD, cédéHungarian
• CDIndonesian
• CDItalian
• コンパクトディスクJapanese
• 콤팩트디스크Korean
• kompaktinė plokštelėLithuanian
• kompaktdisksLatvian
• cakera padatMalay
• CD-plate, kompaktplateNorwegian
• płyta kompaktowaPolish
• لوح فشردهPersian
• سی دیPashto
• компакт-дискRussian
• CD, kompaktný diskSlovak
• CD ploščaSlovenian
• kompakt-diskSerbian
• cdSwedish
• แผ่นซีดีThai
• CDTurkish
• 光碟(縮寫)Chinese (Trad.)
• компакт-дискUkrainian
• کمپیکٹ ڈسکUrdu
• đĩa compactVietnamese
• 光盘（缩写式）Chinese (Simp.)