<p><strong>Noun</strong></p><ul><li>a portion of a cord, ribbon, etc., folded or doubled upon itself so as to leave an opening between the parts</li><li>anything shaped more or less like a closed curve, as a line drawn on paper, a part of a letter or other symbol, a part of a path, or a line of motion</li><li>a curved piece or a ring of metal, wood, or the like, used for the insertion of something, as a handle, etc.</li><li>intrauterine device</li><li>a maneuver executed by an airplane in such a manner that the airplane describes a closed curve in a vertical plane (Aeronautics)</li><li>a circular area at the end of a trolley line, railroad line, etc., where cars turn around</li><li>an arm of a cloverleaf where traffic may turn off or onto a main road or highway</li><li>the part of a vibrating string, column of air or other medium, etc., between two adjacent nodes (Physics)</li><li>a closed electric or magnetic circuit (Electricity)</li><li>the reiteration of a set of instructions in a routine or program (Computers)</li><li>a wire, usually of platinum, one end of which is curved to form a loop, used for transferring microorganisms from one medium to another</li><li>a sandbar that encloses or nearly encloses a body of water</li><li>a school figure in which a skater traces a large half circle, a small oval within its arc, and another large half circle to complete the figure while remaining on the same skating edge (Figure Skating)</li><li>the Loop, the main business district of Chicago</li></ul><p><strong>Verb (used with object)</strong></p><ul><li>to form into a loop</li><li>to make a loop in</li><li>to enfold or encircle in or with something arranged in a loop</li><li>to fasten by forming into a loop, or by means of something formed into a loop (often followed by up)</li><li>to cause (a missile or projectile) to trace a looping or looplike trajectory through the air</li><li>to fly (an airplane) in a loop or series of loops</li><li>to connect (conductors) in the shape of a loop within a closed electric or magnetic circuit</li><li>to complete by recording dialogue, sound effects, etc., onto an existing film track or soundtrack (Movies)</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>to make or form a loop</li><li>to move by forming loops, as an inchworm does</li><li>to trace a looping or looplike path through the air</li><li>to perform a loop or series of loops in an airplane</li><li>to record dialogue, sound effects, etc., onto an existing film track or soundtrack (Movies)</li></ul>