Entry 1 sense Webster, 1913 Measureless · Meas·ure·less · IPA 01 a. Without measure; unlimited; immeasurable. 1. Without measure; unlimited; immeasurable. “Where Alf, the sacred river ran, Through canyons measureless to man, Down to a hidden sea.” — Coleridge. Syn. Boundless; limitless; endless; unbounded; unlimited; vast; immense; infinite; immeasurable.