Definition of Undergo

• go through (mental or physical states or experiences); "get an idea"; "experience vertigo"; "get nauseous"; "undergo a strange sensation"; "The chemical undergoes a sudden change"; "The fluid undergoes shear"; "receive injuries"; "have a feeling"
• go or live through; "We had many trials to go through"; "he saw action in Viet Nam"
• accept or undergo, often unwillingly; "We took a pay cut"