(rail transport) On a steam locomotive, an unpowered wheel or axle located behind the driving wheels.

On a steam locomotive, a railroad truck to which wheel axles (and, hence, wheels) for one or more coupled pairs of unpowered wheels are attached through bearings, located behind the driving wheels.

On a steam locomotive, an axle connecting a coupled pair of unpowered wheels located behind the driving wheels.

(aeronautics) The rearmost edge of a wing or other airfoil.

A formal, often computerized record or log of the financial transactions of an organization or system.

plural of audit trail

(rail transport, plural only) A set of points at which two routes converge in the direction of travel.

plural of star trail

(astronomy, photography) The line of light recorded on a photographic medium when a time exposure is made of a star in the nighttime sky using a camera on a fixed mount, caused by the rotation of the earth during the period of time when the camera's shutter is held open.

Alternative spelling of trailhand