stringline adjective 1verb 1forms 3 adjective1 •Describing a derailment typically occurring when a train having improperly distributed weight starts or accelerates on sharply curving track verb1 •To derail on sharply curving track, usually due to incorrectly distributed weightThe train stringlined on a curve when the engineer increased power at the front. — 2007 formsstringlined · stringlining · stringlines