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tie off

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tie something off

to tie the ends of something losing fluid, as blood vessels to prevent bleeding. The surgeons tied all the blood vessels off—one by one—as they were exposed. They tied off all the vessels very quickly.

See also: off, tie

tie off

v.

1. To attach and anchor someone or something with a knot: We tied off the rowboat and went ashore. I passed the rope through the metal ring and tied it off with a taut-line hitch.

2. To close or seal something with a knot: We tied off the legs of the scarecrow's pants and filled them up with hay. The clown inflated the balloon and tied it off.

See also: off, tie