Definition of "fight back" []

• To defend oneself by fighting. (verb)
• To overturn a losing deficit. (verb)

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• "But an underdrilled immune system may result in too few key immune cells becoming educated enough to know how to recognize and fight back against different attacks in an effective manner."
• "In thinking about power, we must face the possibility that as the forces of integrity increase, the forces of anti-integrity will fight back with increased viciousness."
• "But when I saw the full impact of the attack on his still-bruised body, I had to swallow hard to fight back my tears."