1. literal: to mix gradually. figurative: to remain unnoticed or camouflaged
blend in with the crowd
The phrasal verb 'blend in' means to be similar to the objects, people, buildings or social constructs around them. Someone who 'blends in' conforms to what is expected. To 'blend in' is the opposite of 'to stand out'. This can have a positive or negative connotation 'blending in' can be a necessary part of being accepted or it can mean something or someone is boring and predictable.