English definition of “strain”
FEELING [C, U] › when you feel worried and nervous about something: The strain of the last few months had exhausted her.
put a strain on sb/sth › to cause problems for someone or to make a situation difficult: Children put tremendous strains on a marriage.
INJURY [C, U] › an injury to part of your body that is caused by using it too much: back strain
STRETCH [U] › when something is pulled or stretched too tightly: The rope broke under the strain.
DISEASE/PLANT [C] › a type of disease or plant: a new strain of virus