Definition of "Itch" :

noun: an irritating cutaneous sensation that produces a desire to scratch

noun: a strong restless desire

noun: a contagious skin infection caused by the itch mite; characterized by persistent itching and skin irritation

"He has a bad case of the itch."

verb: have a strong desire or urge to do something

"She is itching to start the project."

verb: scrape or rub as if to relieve itching

verb: have or perceive an itch

"I'm itching--the air is so dry!."

verb: cause to perceive an itch

"His skin itched."