ligation

noun

1. (countable, uncountable)Something that ties, a ligature.
2. (countable, uncountable)The act of tying, of applying a ligature.
3. (countable, uncountable)The state of having a ligature, of being tied.
4. (countable, uncountable)The act of tying off or sealing a blood vessel, fallopian tube, etc during surgery; act of ligating.
5. (countable, uncountable)The formation of a complex by reaction with a ligand.