Entry 2 senses · 2 variants Webster, 1913 Conacre · Con·a·cre · IPA v. t. n. 01 v. t. To underlet a portion of, for a single crop; -- said of a farm. 1. To underlet a portion of, for a single crop; -- said of a farm.[Ireland] 02 n. A system of letting a portion of a farm for a single crop. 1. A system of letting a portion of a farm for a single crop.[Ireland]