Uppermost
/ˈʌpəˌrmoʊst/
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Definition
(adj) At or nearest the top of something.
Sentence Examples
You'll only see them in the uppermost canopy.
When the lift reaches the building's uppermost floors, its ceiling light starts to flicker.
CEFR Practice Quiz
The safety of the passengers was the ____ concern for the airline staff during the whole of the flight today.