C1 [ C or U ] the pair of long metal bars fixed on the ground at an equal distance from each other, along which trains travel:

B1 [ C ] UK a path or rough road that is made of soil rather than having a surface covered with stone or other material:

B1 [ C ] a type of path or road, often in the shape of a ring, that has been specially designed and built for sports events, especially racing:

B2 [ U ] US a sport in which people compete with each other by running a race on a specially prepared circular path:

[ U ] US also track and field, UK athletics the general name for a particular group of sports in which people compete, including running, jumping, and throwing

B2 [ C usually plural ] a mark or line of marks left on the ground or on another surface by an animal, person, or vehicle that has moved over it, showing the direction they moved in:

[ C ] the direction that something has taken or will take through the air:

C2 [ C or U ] the direction in which someone's job or education develops:

[ C usually singular ] the way in which a thought or idea has developed or might develop:

US UK stream a group of school students with similar ability who are approximately the same age and are taught together:

B2 [ C ] one of several songs or pieces of music on a CD or other musical recording:

[ C ] a part of a magnetic strip onto which sound can be recorded, with several tracks on one magnetic strip:

C2 [ T ] to follow a person or animal by looking for proof that they have been somewhere, or by using electronic equipment:

C2 [ T ] to record the progress or development of something over a period:

[ I ] If a film or video camera tracks in a particular direction, it moves along while it is filming:

[ I ] specialized media If a moving part of a recording machine tracks, it gets into the correct position for operating:

[ T ] to follow the level of an interest rate, share price, etc.:

[ T ] US UK track to group and teach together school students with similar abilities who are approximately the same age: