(intransitive) To ring a bell slowly, especially for a funeral; to toll. / (transitive) To signal or proclaim something (especially a death) by ringing a bell.

The sound of a bell knelling; a toll (particularly one signalling a death). / (figuratively) A sign of the end or demise of something or someone.

(rugby) A foul in which a player knocks the ball forward. / (chiefly UK) Resulting as an indirect effect.

(figuratively) Lacking will power or strength of character; timid. / (literally) Used other than figuratively or idiomatically: see weak, kneed.

Familiar, famous, renowned or widely known. / (computing, not comparable) Generally recognised; reserved for some usual purpose.

A unified body or collection of knowledge regarding a specific subject.

A knot which attaches a line to an object and tightens when pressure is applied. Also called a running knot. / A knot which attaches a line to the middle of another, allowing it to slide

(cricket) the thick part of a batsman's pads that protects the knee

(idiomatic, derogatory) Having a superficially positive appearance that is belied by the reality, e.g., superficially elegant and beautiful but actually common.

Unthinking, not carefully considered, (nearly) automatic, spontaneous, easily predictable.