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

1 day ago · 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,” …

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 …

Nov 29, 2025 · silly (comparative sillier, superlative silliest) Laughable or amusing through foolishness or a foolish appearance. quotations They were laughing at a silly joke. silly grin

Foolish, as an epithet of contempt; characterized by weakness or folly; manifesting want of judgment or common sense; stupid or unwise: as, a silly coxcomb; a silly book; silly conduct.

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