›informalto behave in a silly or excited way because you have taken drugs or drunk a lot of alcohol: I tried to talk to her after the party, but she was as high as a kite.Drunkenness and sobrietyDrugs - general wordsSpecific types of drug›to feel very happy and excited: I was a high as a kite when I heard I'd got the job.Feeling pleasure and happinessTaking pleasure in somethingExcited, interested and enthusiastic