μνήμη/mnēmē

This word is a type of thing or idea. It is a noun.

This word can mean a memory or remembrance of something. When used in this way, this word is used to talk about something that is remembered or thought about again.
This word can mean a mention of something. When used in this way, this word is used to talk about something that is briefly spoken about.

See: 2 Peter 1:15