1. a structure consisting of a pair of parallel lines of rails with their crossties, on which a railroad train, trolley, or the like runs.
2. a wheel rut.
3. evidence, as a mark or a series of marks, that something has passed.
4. footprints or other marks left by an animal, person, or vehicle: a lion's tracks; car tracks.
5. a path made or beaten by or as if by the feet of people or animals; trail: to follow the track of a murderer.
6. a line of travel or motion: the track of a bird.
7. a course or route followed.
8. a course of action, conduct, or procedure: on the right track to solve the problem.
9. a path or course made or laid out for some particular purpose.
10. a series or sequence of events or ideas.
11. something associated with making a track, as the wheel span of a vehicle or the tread of a tire.
12. a caterpillar tread.
13. Sports.
• a course laid out for running or racing.
• the group of sports performed on such a course, as running or hurdling, as distinguished from field events.
• both track and field events as a whole.
14. Recording.
• a band of recorded sound laid along the length of a magnetic tape.
• band² (def. 6).
• an individual song or segment of a recording: a title track.
• a discrete, separate recording that is combined with other parts of a musical recording to produce the final aural version: a special rhythm track added to the basic track.
15. the distance between the centers of the treads of either the front or rear wheels of a vehicle.
16. a data-recording path on a storage medium, as a magnetic disk, tape, or drum, that is accessible to a read-write head in a given position as the medium moves past.
17. needle marks on the arm, leg, or body of a drug user caused by habitual injections.
18. sound track.
19. a metal strip or rail along which something, as lighting or a curtain, can be mounted or moved.
20. a study program or level of curriculum to which a student is assigned on the basis of aptitude or need; academic course or path.

21. to follow or pursue the track, traces, or footprints of.
22. to follow (a track, course, etc.).
23. to make one's way through; traverse.
24. to leave footprints on (often followed by up or on): to track the floor with muddy shoes.
25. to make a trail of footprints with (dirt, snow, or the like): The dog tracked mud all over the living room rug.
26. to observe or monitor the course or path of (an aircraft, rocket, satellite, star, etc.), as by radar or radio signals.
27. to observe or follow the course of progress of; keep track of.
28. to furnish with a track or tracks, as for railroad trains.
29. to have (a certain distance) between wheels, runners, rails, etc.

30. to follow or pursue a track or trail.
31. to run in the same track, as the wheels of a vehicle.
32. to be in alignment, as one gearwheel with another.
33. to have a specified span between wheels or runners: The car's wheels track about five feet.
34. dolly (def. 12).
35. to follow the undulations in the grooves of a phonograph record.

36. to pursue until caught or captured; follow: to track down a killer.

37. in the spot in which one is or is standing at the moment: He stopped dead in his tracks, listening for the sound to be repeated.
38. to be aware; keep informed: Have you been keeping track of the time?
39. to fail to keep informed; neglect to keep a record: He soon lost track of how much money he had spent.
40. to go or depart in a hurry: to make tracks for the store before closing time.
41. departing from the objective or the subject at hand; astray: He can't tell a story without getting off the track.
42. in search or pursuit of; close upon: They are on the track of a solution to the problem.
43. from a poor or wealthy part of a community or of society: born on the wrong side of the tracks.

1. the mark or trail left by something that has passed by
2. any road or path affording passage, esp a rough one
3. a rail or pair of parallel rails on which a vehicle, such as a locomotive, runs, esp the rails together with the sleepers, ballast, etc, on a railway
4. a course of action, thought, etc
5. a line of motion or travel, such as flight
6. an endless jointed metal band driven by the wheels of a vehicle such as a tank or tractor to enable it to move across rough or muddy ground
7. the path of a particle of ionizing radiation as observed in a cloud chamber, bubble chamber, or photographic emulsion
• a course for running or racing
• (as modifier)
9. US and Canadian
• sports performed on a track
• track and field events as a whole
10. a path on a magnetic recording medium, esp magnetic tape, on which information, such as music or speech, from a single input channel is recorded
11. any of a number of separate sections in the recording on a record, CD, or cassette
12. a metal path that makes the interconnections on an integrated circuit
13. the distance between the points of contact with the ground of a pair of wheels, such as the front wheels of a motor vehicle or the paired wheels of an aircraft undercarriage
14. a hypothetical trace made on the surface of the earth by a point directly below an aircraft in flight
15. to follow the passage, course, or progress of
16. to fail to follow the passage, course, or progress of
17. off the beaten track See beaten (def. 4)
18. away from what is correct or true
19. on the scent or trail of; pursuing
20. the correct line of investigation, inquiry, etc
21. the incorrect line of investigation, inquiry, etc

22. to follow the trail of (a person, animal, etc)
23. to follow the flight path of (a satellite, spacecraft, etc) by picking up radio or radar signals transmitted or reflected by it
24. US railways
• to provide with a track
• to run on a track of (a certain width)
25. (of a camera or camera operator) to follow (a moving object) in any direction while operating
26. to move (a camera) towards the scene (track in) or away from the scene (track out)
27. to follow a track through (a place)
28. (of the pick-up, stylus, etc, of a record player) to follow the groove of a record

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