cap noun
1 soft flat hat
ADJ. flat, peaked | cloth | baseball, bathing, cricket, forage, school, shower, skull, swimming
CAP + NOUN badge > Special page at CLOTHES
2 covering for the end/top of sth
ADJ. filler, hub, lens | screw The bottle has a screw cap.
VERB + CAP put on, screw on Put the cap back on the pen. | remove, take off, unscrew
You can also check other dicts: cap (English, 中文解释 ), wordnet sense, Collins Definition