IPA: /ˈaʊtmoʊst/
KK: /ˈaʊtmoʊst/
The furthest away from the center or inside; the outermost part.
The outmost layer of the cake was decorated with icing.
Outmost is formed from "out" (meaning outside or external) and "most" (meaning the greatest degree or furthest). The word "outmost" refers to the furthest point or the extreme outer part of something.
Think of being the 'furthest outside' — 'out' means outside, and 'most' indicates the greatest degree. This helps you remember that 'outmost' refers to the outermost point.