Silly Definition

sĭlē
sillier, sillies, silliest
adjective
sillier, silliest
Simple; plain; innocent.
Webster's New World
Feeble; infirm; helpless.
Webster's New World
Having or showing little sense, judgment, or sobriety; foolish, stupid, absurd, ludicrous, irrational, etc.
Don't be silly, it's no bother.
Webster's New World
Feebleminded; imbecile.
Webster's New World
Frivolous or trivial.
Webster's New World
noun
sillies
A silly person.
Webster's New World
(colloquial) A mistake.
Wiktionary

Other Word Forms of Silly

Noun

Singular:
silly
Plural:
sillies

Adjective

Base Form:
silly
Comparative:
sillier
Superlative:
silliest

Origin of Silly

  • Phonetic variant of seely. From Old English *sǣliġ, "blessed", (attested only in form ġesǣliġ), from Proto-Germanic *sēlīgaz. Cognate with West Frisian sillich, Dutch zalig, German selig. More at sely.

    From Wiktionary

  • Middle English seli, silli blessed, innocent, hapless from Old English gesælig blessed

    From American Heritage Dictionary of the English Language, 5th Edition

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