1SG a rough path across countryside or through a forest :
The trail led over Boulder Pass before descending to a lake. ➔ nature trail
The trail led over Boulder Pass before descending to a lake.2 a long line or a series of marks that have been left by someone or something
3 a series of unpleasant situations or feelings that have been left by someone or something
trail of
He left a trail of broken hearts and broken promises.
He left a trail of broken hearts and broken promises.4 a sign that a person or animal has been in a place, used for finding or catching them :
The hunters lost the tiger's trail in the middle of the jungle.
Police tracked him to Valencia and there the trail went cold (=they could not find any signs of him).
The hunters lost the tiger's trail in the middle of the jungle.
Police tracked him to Valencia and there the trail went cold (=they could not find any signs of him).5 to be trying to find someone or something by getting information about them :
industrial spies on the trail of technological secrets
Police believe they are hot on the trail of a drug-smuggling gang (=they are close to finding them).
be on the trail of somebody/something
industrial spies on the trail of technological secrets
Police believe they are hot on the trail of a drug-smuggling gang (=they are close to finding them).6 all the places that a particular group of people visit for a particular purpose :
a town on the tourist trail
a town on the tourist trail7 the set of things that someone does to achieve something :
