Entry 1 sense Webster, 1913 Lessor /(lĕs"sŏr [or] lĕs*sôr")/ · Les·sor · IPA /ˈlɛsɚ/ 01 n. One who leases; the person who lets to farm, or gives a lease. 1. One who leases; the person who lets to farm, or gives a lease.(Law)