Longman Dictionary of Contemporary English - silly

~1 adj 1 not sensible, showing bad judgment  (This may sound like a silly question, but what is the point of this exercise? | a silly thing to do/say)  (I left my keys at home, which was a pretty silly thing to do.)  (- see shame1) 2 stupid in a childish or embarrassing way  (I wish you kids would stop being so silly. | a silly hat | I hate their parties - we always end up playing silly games.) 3 spoken not serious or practical  (They served us coffee in these silly little cups. | Try making a silly offer - they might just accept it.) 4 bore sb silly informal to make someone extremely bored 5 drink yourself silly informal to get very drunk - silliness n ~2 n spoken used to tell someone that you think they are being stupid  (No, silly, I didn't mean that!)