Princeton's WordNet

1. silly(adj)

   a word used for misbehaving children

   "don't be a silly"

2. cockamamie, cockamamy, goofy, sappy, silly, wacky, whacky, zany(adj)

   ludicrous, foolish

   "gave me a cockamamie reason for not going"; "wore a goofy hat"; "a silly idea"; "some wacky plan for selling more books"

3. airheaded, dizzy, empty-headed, featherbrained, giddy, light-headed, lightheaded, silly(adj)

   lacking seriousness; given to frivolity

   "a dizzy blonde"; "light-headed teenagers"; "silly giggles"

4. pathetic, ridiculous, silly(adj)

   inspiring scornful pity

   "how silly an ardent and unsuccessful wooer can be especially if he is getting on in years"- Dashiell Hammett

5. punch-drunk, silly, slaphappy(adj)

   dazed from or as if from repeated blows

   "knocked silly by the impact"; "slaphappy with exhaustion"

Kernerman English Learner's Dictionary

1. silly(adjective)ˈsɪl i

   stupid and childish

   Stop being silly now.; It'd be silly to give up now.

2. sillyˈsɪl i

   unimportant

   It's just a silly sticker - why get upset?

Wiktionary

1. silly(Noun)

   A silly person; a fool.

2. silly(Noun)

   A mistake.

3. silly(Adjective)

   Pitiable; deserving of compassion; helpless.

4. silly(Adjective)

   Simple, unsophisticated, ordinary; rustic, ignorant.

5. silly(Adjective)

   foolish, showing a lack of good sense and wisdom; frivolous, trifling.

   I made a very silly mistake.

6. silly(Adjective)

   irresponsible, showing irresponsible behaviors.

   What a silly kid, he's always getting in trouble.

7. silly(Adjective)

   playful, giggly.

   The newlyweds called each other silly little nicknames.

8. silly(Adjective)

   semiconscious, witless.

   The impact of the ball knocked him silly.

9. silly(Adjective)

   of a fielding position, very close to the batsman; closer than short

10. silly(Adjective)

    simple, not intelligent, refined.

    John was prosperous and his helpless, silly father could be of no use to him.

Origin: Phonetic variant of seely.

Webster Dictionary

1. Silly(noun)

   happy; fortunate; blessed

2. Silly(noun)

   harmless; innocent; inoffensive

3. Silly(noun)

   weak; helpless; frail

4. Silly(noun)

   rustic; plain; simple; humble

5. Silly(noun)

   weak in intellect; destitute of ordinary strength of mind; foolish; witless; simple; as, a silly woman

6. Silly(noun)

   proceeding from want of understanding or common judgment; characterized by weakness or folly; unwise; absurd; stupid; as, silly conduct; a silly question

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