strain definition

1. (physics) deformation of a physical body under the action of applied forces
2. (psychology) nervousness resulting from mental stress
• examples: his responsibilities were a constant strain
• examples: the mental strain of staying alert hour after hour was too much for him
3. injury to a muscle (often caused by overuse); results in swelling and pain
4. an intense or violent exertion
5. use to the utmost; exert vigorously or to full capacity
• examples: He really extended himself when he climbed Kilimanjaro
• examples: Don't strain your mind too much
6. become stretched or tense or taut
• examples: the bodybuilder's neck muscles tensed;
• examples: the rope strained when the weight was attached