/ ˈʌpəməʊst; NAmE ˈʌpərmoʊst/ adjective , adverb
■ adjective
1.
[ usually before noun ] ( formal ) higher or nearer the top than other things :
the uppermost branches of the tree
2.
[ not usually before noun ] more important than other things in a particular situation :
These thoughts were uppermost in my mind .
■ adverb
( formal ) in the highest position; facing upwards :
Place the material on a flat surface, shiny side uppermost.