[noun] a tight cluster of people or things; "a small knot of women listened to his sermon"
[noun] any of various fastenings formed by looping and tying a rope (or cord) upon itself or to another rope or to another object
[noun] a hard cross-grained round piece of wood in a board where a branch emerged; "the saw buckled when it hit a knot"
[noun] 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" Synonyms:gnarl