Definition of "Tension" :

noun: the action of stretching something tight

"Tension holds the belt in the pulleys."

noun: (physics) a stress that produces an elongation of an elastic physical body

"The direction of maximum tension moves asymptotically toward the direction of the shear."

noun: feelings of hostility that are not manifest

"The diplomats' first concern was to reduce international tensions."

noun: a balance between and interplay of opposing elements or tendencies (especially in art or literature)

"There is a tension created between narrative time and movie time."

noun: (psychology) a state of mental or emotional strain or suspense

"He suffered from fatigue and emotional tension."

noun: the physical condition of being stretched or strained

"It places great tension on the leg muscles."