| Noun | 1. | log - a segment of the trunk of a tree when stripped of branchesnurse log - a large decomposing tree trunk that has fallen, usually in a forest; the decaying wood provides moisture and nutrients for a variety of insects and plants saw log - log large enough to be sawed into boards wood - the hard fibrous lignified substance under the bark of trees | |
| 2. | log - large log at the back of a hearth firefirewood - wood used for fuel; "they collected and cut their own firewood" Yule log - large log traditionally burned at Christmas | |
| 3. | log - the exponent required to produce a given numberexponent, index, power - a mathematical notation indicating the number of times a quantity is multiplied by itself | |
| 4. | log - a written record of messages sent or received; "they kept a log of all transmission by the radio station"; "an email log" | |
| 5. | log - a written record of events on a voyage (of a ship or plane)aeroplane, airplane, plane - an aircraft that has a fixed wing and is powered by propellers or jets; "the flight was delayed due to trouble with the airplane" ship - a vessel that carries passengers or freight | |
| 6. | log - measuring instrument that consists of a float that trails from a ship by a knotted line in order to measure the ship's speed through the waterharpoon log - a cylindrical log with a device that registers distance log line - a knotted cord that runs out from a reel to a piece of wood that is attached to it ship - a vessel that carries passengers or freight | |
| Verb | 1. | log - enter into a log, as on ships and planes | |
| 2. | log - cut lumber, as in woods and forestsfell, strike down, cut down, drop - cause to fall by or as if by delivering a blow; "strike down a tree"; "Lightning struck down the hikers" | |