C2to change or develop so as to be in a different position or condition: Those pictures will have to come down(= be removed from the wall).He pulled the knob and it just came off (in his hand).How many times have you come off that horse?Two of his teeth came out after he got hit in the face.Can you get this cork to come out of the bottle?When does the heating come on(= start working)?[+ adj]A wire has come loose at the back.The door came open for no apparent reason.ChangingAdapting and modifying Adapting and attuning to somethingChanging frequently