logline

1. (authorship) A very short summary of a script or screenplay.Examples: "Screenwriting Tip #12: If you don't know your own logline, you probably don't know what your script is about. Some writers will tell you they don't have a logline. Their screenplay is “too complex” or “too character-driven,” […]"; "The first step in outlining is to make sure that your logline, that one-or-two- sentence summary of your movie you first created in chapter 2 (“Jump-starting the Screenplay”), is the best that it can be in capturing what your movie is about now."

2. (nautical) The line fastened to the log, and marked for finding the speed of a vessel.Examples: "Besides the ingenious Pilot knowing the elevation of the Pole in some places of his voyage that he hath passed, by keeping a true, not a dead reckoning of his course in pricking his Card aright, and observing the way with the logge-line, with other currants, will give a very artificiall conjecture of the elevation of the pole in that place where he is, though he sec neither Sunne nor Starres."; "Bring the ship to rights, that is, againe under saile as she was, some use a Log line, and a minute glasse to know what way shee makes, but that is so uncertaine, it is not worth the la­bour to trie it."; "The 120th part of that Mile is 41⅔ feet, and so much is the space betweene the Knots upon the Log-line: So many Knots as the ship runs in half a minute, so many Miles she sayleth in an hour; or so many Leagues, and so many Miles she runneth in a Watch or four hours, called A Watch, because one half of the Ships Company watcheth by turns, and changes every four hours."