adj. sil·li·er, sil·li·est 1. 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 each other. 3. Semiconscious; dazed: knocked silly by the impact. [Middle English seli, silli, blessed, innocent, hapless, from Old English gesælig, blessed.] silli·ly (sĭlə-lē) adv. silli·ness n. |
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