[ T ] to hit someone or something forcefully with the flat inside part of your hand, producing a short, loud noise, especially as a way of punishing a child:

[ I or T, usually + adv/prep ] to hit something hard against something else:

[ C ] a hit from someone's flat hand as a punishment:

[ C ] informal a hit given with the fist (= closed hand):

[ C ] a short, loud noise:

[ C ] informal a loud kiss:

[ U ] slang heroin (= a strong illegal drug):

exactly in a place or a situation:

directly and forcefully, producing a short, loud noise: