Meaning

noun the wood of trees cut and prepared for use as building material

noun an implement used in baseball by the batter

verb move heavily or clumsily

originExact origin unknown. The earliest recorded reference for the noun was to heavy, useless objects such as old, discarded furniture. Perhaps from the verb lumber in reference to meaning "awkward to move"; Online Etymological Dictionary thinks this may derive from the same root as lame. Possibly influenced by Lumbar, an obsolete variant of Lombard, the Italian immigrant class known for being…

Etymology from Wiktionary, CC BY-SA 3.0