knot

1 knot /ˈnɑːt/ noun
plural knots
1 knot
/ˈnɑːt/
noun
plural knots
Britannica Dictionary definition of KNOT
[count]
1 
a  : a part that forms when you tie a piece of rope, string, fabric, etc., to itself or to something else
— see also granny knot, slipknot, square knot
b  : a part where something has become twisted or wrapped around itself
— often used figuratively
— see also gordian knot
2 
: a painful or uncomfortable feeling of tightness in part of your body
3 
: a dark round mark on a piece of wood that shows where a branch grew
4 
: a way of arranging long hair by twisting it into a round shape at the sides or back of the head
5 
: a group of people who are standing or sitting close together
6 
: a unit of speed equal to one nautical mile per hour

at a rate of knots

— see 1rate

tie the knot

informal
: to get married

tie yourself (up) in knots

1 
: to cause problems for yourself because you are being too careful, trying too hard, etc.
2 
: to become very upset or worried
2 knot /ˈnɑːt/ verb
knots; knotted; knotting
2 knot
/ˈnɑːt/
verb
knots; knotted; knotting
Britannica Dictionary definition of KNOT
1 
[+ object] : to tie a section of rope, string, fabric, etc., to itself or to something else so that a knot forms : to make a knot in (something)
also : to connect (two or more parts or things) with a knot
2 
[no object] : to develop a painful or uncomfortable feeling of tightness — often + up
3 
[+ object] US, informal : to make (the score of a game or contest) equal