Log meaning : The trunk of a dead tree, cleared of branches. Any bulky piece as cut from the above, used as timber, fuel etc. A unit of length equivalent to 16 feet, used for measuring timber, especially the trunk of a tree. Anything shaped like a log; a cylinder. A floating device, usually of wood, used in navigation to estimate the speed of a vessel through water. A blockhead; a very stupid person. A heavy longboard. A rolled cake with filling. A weight or block near the free end of a hoisting rope to prevent it from being drawn through the sheave. A piece of feces. A penis. To cut trees into logs. To cut down (trees). To cut down trees in an area, harvesting and transporting the logs as wood.