Tacks

from Samuel Taylor Coleridge – Rime Of The Ancient Mariner on Rap Genius

Meaning

Nautical:

a. to change the course of a sailing vessel by bringing the head into the wind and then causing it to fall off on the other side: He ordered us to tack at once.

b. (of a sailing vessel) to change course in this way.

c. to proceed to windward by a series of courses as close to the wind as the vessel will sail.

http://dictionary.reference.com/browse/tack?r=75&src=ref&ch=dic

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