Be unable to think of or recall. To forget a name. To cease to remember; See examples of forget used in a sentence. Be unable to recall. I forgot to lock the gate. To omit or neglect unintentionally: How to use forget in a sentence. To forget ones keys. Synonym discussion of forget. Take no note of (often used imperatively): To leave behind unintentionally: Forget cooking, lets eat out tonight. To cease or fail to remember; The meaning of forget is to lose the remembrance of : To fail to think of; To forget (about) is to stop thinking about someone or something, or to stop thinking about doing something: · forget (third-person singular simple present forgets, present participle forgetting, simple past forgot or (obsolete) forgat, past participle forgotten or (archaic or colloquial) forgot) (transitive) to lose remembrance of. Be unable to recall: