B2[Cusually singular or U]a force or influence that stretches, pulls, or puts pressure on something, sometimes causing damage: The hurricane put such a strain on the bridge that it collapsed.As you get older, excess weight puts a lot of strain on the heart.Their constant arguments were putting a strain on their marriage.The recent decline in the dollar has put a bigger strain on the economic system.Migration into the cities is putting a strain on already stretched resources.Energy, force and powerPower and intensityAnxious and worriedC2[C]an injury to a muscle or similar soft part of the body caused by using that part too much: a groin/hamstring strain→ See alsoeyestrainInjuring and injuriesB2[C or U]something that makes you feel nervous and worried: She's a lot better than she was but she's still not ready to face the stresses and strains of a job.He's been under a lot of strain recently.Anxiety and worry - general wordsFear and phobias