Noun
1. a tight cluster of people or things;
"a small knot of women listened to his sermon"2. any of various fastenings formed by looping and tying a rope (or cord) upon itself or to another rope or to another object
3. a hard cross-grained round piece of wood in a board where a branch emerged;
"the saw buckled when it hit a knot"4. something twisted and tight and swollen;
"their muscles stood out in knots""the old man's fists were two great gnarls""his stomach was in knots"5. a unit of length used in navigation; equivalent to the distance spanned by one minute of arc in latitude; 1,852 meters
6. soft lump or unevenness in a yarn; either an imperfection or created by design
7. a sandpiper that breeds in the arctic and winters in the southern hemisphere