Definitions for "Trace fossil"
A feature preserved in the geological record that was created by an organism - rather than a preserved potion (or cast) of the organism itself. Dinosaur footprints are tracefossils.
Evidence of the activity of an ancient animal (for example, burrow, boring, footprint, coprolite, bite mark).
Any indirect evidence of ancient life as represented by the effects of behavior. Includes tracks, trails, burrows, toothmarks, gastroliths, coprolites, and nests.