lumberjack UK /ˈlʌm.bə.d͡ʒæk/US /ˈlʌm.bɚ.d͡ʒæk/noun 2verb 1forms 3 noun2 •A person whose work is to fell trees.He's a lumberjack and he's OK / He sleeps all night and works all day / I cut down trees, I eat my lunch / I go to the lavatory — 1975 •A lumberjacket. verb1 •To work as a lumberjack, cutting down trees.Many of the lumberjacking memories have faded to black and white, the brightest moments colored mostly by Jim McKay’s yellow blazer. — 2009 formslumberjacked · lumberjacking · lumberjacks