Entry 1 sense Webster, 1913 Lumberman /lŭm'-bẽrm-ən/ · Lum·ber·man · IPA /lˈʌmbərmən/ 01 n. One who is engaged in lumbering as a business or employment. pl. Lumbermen 1. One who is engaged in lumbering as a business or employment.[U.S.]