To be unable to remember (something).
To treat with thoughtless inattention; neglect: forget one's family.
To leave behind unintentionally.
To fail to mention.
To banish from one's thoughts: forget a disgrace.
Informal To disregard on purpose. Usually used in the imperative: Oh, forget it. I refuse to go!
To cease remembering: Let's forgive and forget.
To fail or neglect to become aware at the proper or specified moment: forgot about my dental appointment.