Webster's English Dictionary

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loop

1. loop \'lu:p\ n [ME loupe] archaic  : LOOPHOLE 
2. loop \'lu:-pe-\ n [ME loupe, of unknown origin] often attrib  1a: a fold 
   or doubling of a line leaving an aperture between the parts thro ugh which 
   another line can be passed or into which a hook may be hooked 1b: such a 
   fold of cord or ribbon serving as an ornament  2a: something shaped like a 
   loop  2b: a maneuver in which an airplane starting from straight and level 
   flight  passes successively through a climb, inverted flight, a dive, and 
   then returns to normal flight 3: a ring or curved piece used to form a 
   fastening or a handle  4a: the portion of a vibrating body between two 
   nodes  4b: the middle point of such a portion  5: a closed electric circuit 
    : into a state of amazement, confusion, or distress  - loopy aj
3. loop vi 1: to make or form a loop  2: to execute a loop in an airplane  
   1a: to make a loop in, or about  1b: to fasten with a loop  2: to join (two 
   courses of loops) in knitting  3: to connect (electric conductors) so as to 
   complete a loop