log
1. log \'lo.g, 'la:g\ n [ME logge, prob. of Scand origin; akin to ON la-g fallen tree; a] often attrib kin to OE licgan to lie - more at LIE 1: a usu. bulky piece or length of unshaped timber; esp : a length of a tree trunk ready for sawing and over six feet long 2: an apparatus for measuring the rate of a ship's motion through the water consisting of a block fastened to a line and run out from a reel 3a: the record of the rate of a ship's speed or of her daily progress; a lso : the full nautical record of a ship's voyage 3b: the full record of a flight by an aircraft 4: any record of performance 2. log vb or logged; or log.ging 1: to cut (trees) for lumber or to clear (land) of trees in lumbering 2: to enter details of or about in a log 3a: to move (an indicated distance) or attain (an indicated speed) as note d in a log 3b1: to sail a ship or fly an airplane for (an indicated distance) 3b2: to have (an indicated record) to one's credit : LUMBER 3. log n : LOGARITHM
Webster's English Dictionary