1. a short sharp-pointed nail, usually with a flat and comparatively large head
2. Nautical the heading of a vessel sailing to windward, stated in terms of the side of the sail against which the wind is pressing
a. a course sailed by a sailing vessel with the wind blowing from forward of the beam
b. one such course or a zigzag pattern of such courses
a. a sheet for controlling the weather clew of a course
b. the weather clew itself
5. Nautical the forward lower clew of a fore-and-aft sail
a. riding harness for horses, such as saddles, bridles, etc.
b. (as modifier): the tack room
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
(Russian, gals; from Dutch hals). (1) The course of a vessel with respect to the wind (for example, a vessel is moving on a starboard tack when the wind is blowing toward the starboard side of a vessel).
(2) The segment of a vessel’s course from turn to turn while maneuvering under sail, carrying out measuring operations, sweeping mines, fishing, and so on.
(3) A rope securing the lower windward corner of the sail (the tack corner) to a mast.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
A small, sharp-pointed nail with a broad flat head.
Adhesive stickiness, such as occurs on the surface of a varnish or ink that has not completely dried. Also known as tackiness.
To change the course of a sailing vessel by coming about so as to take the wind from over the opposite bow (starboard or port).
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
1. A strip of metal, usually lead or copper, used as a clip to secure the edges of metal items in roof construction, such as flashings.
2. A short, sharp-pointed nail.
3. The property of an adhesive that enables it to form a bond of measurable strength immediately after the adhesive and adherend are brought into contact under low pressure.
4. To glue, weld, or otherwise fasten in spots rather than in a continuous line.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.