<p><strong>Noun</strong></p><ul><li>a structure consisting of a pair of parallel lines of rails with their crossties</li><li>a wheel rut</li><li>evidence</li><li>spoor</li><li>record</li><li>trace</li><li>footprints</li><li>marks left by an animal</li><li>path made or beaten by feet</li><li>line of travel or motion</li><li>course or route followed</li><li>course of action</li><li>path or course made for a particular purpose</li><li>series or sequence of events or ideas</li><li>something associated with making a track</li><li>caterpillar tread</li><li>course laid out for running or racing</li><li>group of sports performed on such a course</li><li>band of recorded sound</li><li>individual song or segment of a recording</li><li>discrete, separate recording</li><li>distance between the centers of the treads</li><li>data-recording path on a storage medium</li><li>needle marks on the body of a drug user</li><li>sound track</li><li>metal strip or rail</li><li>study program or level of curriculum</li></ul><p><strong>Verb</strong></p><ul><li>to follow or pursue the track, traces, or footprints</li><li>to follow (a track, course, etc.)</li><li>to make one's way through; traverse</li><li>to leave footprints on</li><li>to make a trail of footprints with</li><li>to observe or monitor the course or path of</li><li>to observe or follow the course of progress</li><li>to furnish with a track or tracks</li><li>to have a certain distance between wheels, runners, rails, etc.</li><li>to follow or pursue a track or trail</li><li>to run in the same track</li><li>to be in alignment</li><li>to have a specified span between wheels or runners</li><li>to follow the undulations in the grooves of a phonograph record</li><li>to pursue until caught or captured</li></ul><p><strong>Adjective</strong></p><ul><li>not applicable</li></ul><p><strong>Adverb</strong></p><ul><li>not applicable</li></ul><p><strong>Pronoun</strong></p><ul><li>not applicable</li></ul><p><strong>Preposition</strong></p><ul><li>not applicable</li></ul><p><strong>Conjunction</strong></p><ul><li>not applicable</li></ul><p><strong>Interjection</strong></p><ul><li>not applicable</li></ul>