Definition of "Yell" :

noun: a loud utterance; often in protest or opposition

noun: a loud utterance of emotion (especially when inarticulate)

"A yell of pain."

verb: utter or declare in a very loud voice

"You don't have to yell--I can hear you just fine."

verb: utter a sudden loud cry

"I yelled to her from the window but she couldn't hear me."