to force liquid out of a container so that it comes out in a stream of very small drops and covers an area [↪ squirt]
spray somebody/something with something
She sprayed herself with perfume.
spray something on/onto/over something
Someone had sprayed blue paint over his car.
Vandals had sprayed graffiti on the walls.
spray crops/plants etc (=cover them with liquid to protect them from insects or disease)
The fruit is sprayed every four weeks.
2 [intransitive always + adverb/preposition]
if liquids or small bits spray somewhere, they are quickly scattered through the air
Champagne sprayed from the bottle.
to shoot a lot of bullets towards a person or place very quickly:
Gunmen sprayed the crowd with bullets.