Entry 1 sense Webster, 1913 Inmost · In·most · IPA 01 a. Deepest within; farthest from the surface or external part; innermost. 1. Deepest within; farthest from the surface or external part; innermost. “And pierce the inmost center of the earth.” — Shak. “The silent, slow, consuming fires, Which on my inmost vitals prey.” — Addison.