outermost

About 0.94 uses per million words.

Meaning

1. adjective superlative form of outer: most outer; farthest outside; as far from the center or inside as possible.

   He lived on the outermost edge of the city.

2. noun That which is outermost.

Similar words

outer outmost utter outlying extreme far-flung far-off distant utmost furthest

Often followed by

layer shell of layers part electrons circle electron ring edge