not expected; unforeseen; surprising: an unexpected pleasure;an unexpected development.

What does it mean when something is unexpected?

Use the adjective unexpected to describe something that takes you by surprise. ... When you don't anticipate something, and have no clue that it's coming, you can call it unexpected. A successful surprise party is always unexpected, and an unexpected visitor can be exciting or inconvenient, depending on who it is.

What is a meaning of unforeseen?

: not anticipated or expected : not foreseen : unexpected an unforeseen delay unforeseen consequences.