Be unable to think of or recall. To omit or neglect unintentionally: I forgot to lock the gate.
Lee Ho Fook, Marvel Stadium Restaurant Docklands, AUVIC OpenTable
To be unable to remember a fact, something that happened, or how to do something: The meaning of forget is to lose the remembrance of : If you forget something or forget to do it, you fail to think about it or fail to remember to do it, for example because you are thinking about other.