a wound or mark made when an insect or plant stings you:
the sharp needle-shaped part of an insect's or animal's body, with which it stings you [= stinger American English]
insect[countable] British EnglishHBAHBI
a sharp pain in your eyes or skin, caused by being hit, by smoke etc:
She felt the sting of tears in her eyes.
if a story, event, or announcement has a sting in its tail, there is an unpleasant part at the end of it
the upsetting or bad effect of a situation:
the sting of rejection
take the sting out of something (=make something less unpleasant or painful)
She smiled to take the sting out of her words.
a clever way of catching criminals in which the police secretly pretend to be criminals themselves