Lumber/ˈlʌmbər/ Definition 1 of 4Pro Tip 1/3Construction Material Refers to processed wood for structures; remember it's a building context, not small-scale crafting. The cabin was made from pine lumber. Pro Tip 2/3Associated Places Often linked with where it's processed or sold, like 'lumber mill' or 'lumber yard.' We'll get our supplies from the local lumber yard. Pro Tip 3/3Not Always Smooth 'Rough lumber' means it's unprocessed and textured, not smooth. The chair was carved from rough lumber.