▸ noun [mass noun]
1 highly unpleasant physical sensation caused by illness or injury:
she's in great pain
[count noun] chest pains.
▪ mental suffering or distress:
the pain of loss.
▪ informal, derogatory (also pain in the neck) an annoying or tedious person or thing:
she's a pain
it's not a huge problem—just a bit of a pain
I must have been a pain in the neck, always asking questions.
▸ verb [with object] cause mental or physical pain to:
it pains me to say this
her legs had been paining her.
▪ [no object] mainly North American English (of a part of the body) hurt:
sometimes my right hand would pain.
– ORIGIN Middle English (in the sense ‘suffering inflicted as punishment for an offence’): from Old French peine, from Latin poena ‘penalty’, later ‘pain’.