Definition from macmillandictionary.com
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I tried to ease the tension (=make it less strong) with a joke.
Symptoms include nervous tension, depression, and insomnia.
The tension is almost unbearable as the play approaches its climax.
Measures are needed to reduce tension between the two states.
There is bound to be a certain tension between the freedom of individuals and the need for public safety.
Pull in the sail by increasing the tension of the rope.
Can you feel the tension in your neck and shoulders?