lettest in English dictionary lettest Meanings and definitions of "lettest" (archaic) Second-person singular simple present form of let. (dialectal) second-person simple past singular of let verb ( archaic) second-person singular simple present form of [i]let[/i] verb (archaic) second-person singular simple past form of [i]let[/i] more Sample sentences with "lettest" Declension Stem Try again Authors