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the final frontier

Idiom Science fiction

Meaning

the last or most difficult challenge or area of exploration

Example Sentences

"For many scientists, space remains the final frontier."

Related Expressions

An arm and a leg

Something that is very expensive.

Born with a silver spoon in one's mouth

To be born into a wealthy family.

call on

to request someone to speak or do something

Wisdom comes with age

The older you get, the wiser you become, due to experience.

Don't rush things

Take your time and don't hurry.

outstanding in one’s field

to be exceptionally good at one’s work