n. & v.
n. 1 a a figure produced by a curve, or a doubled thread etc., that crosses itself. b anything forming this figure. 2 a similarly shaped attachment or ornament formed of cord or thread etc. and fastened at the crossing. 3 a ring or curved piece of material as a handle etc. 4 a contraceptive coil. 5 (in full loop-line) a railway or telegraph line that diverges from a main line and joins it again. 6 a manoeuvre in which an aeroplane describes a vertical loop. 7 Skating a manoeuvre describing a curve that crosses itself, made on a single edge. 8 Electr. a complete circuit for a current. 9 an endless strip of tape or film allowing continuous repetition. 10 Computing a programmed sequence of instructions that is repeated until or while a particular condition is satisfied.
v. 1 tr. form (thread etc.) into a loop or loops. 2 tr. enclose with or as with a loop. 3 tr. (often foll. by up, back, together) fasten or join with a loop or loops. 4 intr. a form a loop. b move in looplike patterns. 5 intr. (also loop the loop) Aeron. perform an aerobatic loop.
[ ME: orig. unkn. ]