a closed curve generated by cycling the input to a system undergoing hysteresis through an appropriate range

(idiomatic) Not informed, up-to-date, or current; not included in a process or discussion.

An extra length of wire or cable included in an electrical or electromechanical assembly for neatness, accessibility, freedom of movement or future serviceability.

A loop transfer function

(informal) A skimming device fitted to an ATM, used to collect personal banking information by criminals.

(transitive, idiomatic) To astonish; to stagger or overwhelm; to confuse or disorient.

(genetics) Part of a protein that allows it regulate its own genetic expression.

(programming) A section of computer code in which an instruction or group of instructions is repeated only while a certain condition continues to be met.

(US) A highway that loops around the perimeter of a major city. / One of the loops of fabric ringing the waist of a pair of pants, used to hold the belt in place. / The 'D' shaped frame of a belt buckle

(derogatory, slang) Crazy; deranged; fruity