The meaning of SILLY is exhibiting or indicative of a lack of common sense or sound judgment. How to use silly in a sentence. Synonym Discussion of Silly.

/ ˈsɪl·i / Add to word list showing a lack of thought or judgment; not serious and not showing much intelligence: a silly grin

SILLY definition: weak-minded or lacking good sense; stupid or foolish. See examples of silly used in a sentence.

Silly describes something that can't be taken seriously. You might not mind telling silly jokes, but you don't want to be told a project you've worked hard at is silly. Silly originally meant “happy,” which …

Having or exhibiting a lack of good judgment or common sense; foolish. See Synonyms at foolish. 2. Lacking seriousness or responsibleness; frivolous: indulged in silly word play; silly pet names for …

Find 116 different ways to say SILLY, along with antonyms, related words, and example sentences at Thesaurus.com.

If you say that someone or something is silly, you mean that they are foolish, childish, or ridiculous. My best friend tells me that I am silly to be upset about this. You silly boy; why did you tramp about so …

Feb 21, 2026 · Adjective silly (comparative sillier, superlative silliest) Laughable or amusing through foolishness or a foolish appearance. They were laughing at a silly joke. silly grin

As a noun, "a silly person," by 1858 in writing for children. Silly season in journalistic slang is from 1861 (in reference to August and September, when newspapers compensate for a lack of hard news by …

Definition of silly adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.