2.nounPain of mind arising from misfortune, significant personal loss, bereavement, misconduct of oneself or others, etc.; sorrow; sadness.
"She was worn out from so much grief."
3.nounCause or instance of sorrow or pain; that which afflicts or distresses; trial.
4.verbTo deliberately harass and annoy or cause grief to other players of a game in order to interfere with their enjoyment of it; especially, to do this as one’s primary activity in the game.