Meaning of “tension” - Learner’s Dictionary

tension

noun uk us /ˈtenʃən/
NO TRUST [ C, U ]

B2 a feeling of fear or anger between two groups of people who do not trust each other:

ethnic/racial tension
There are growing tensions between the two countries.
BEING NERVOUS [ U ]

B2 a feeling that you are nervous, worried, and not relaxed:

You could feel the tension in the room as we waited for her to arrive.
TIGHT [ U ]

how tight or stiff a muscle, rope, etc, is, or the quality of being tight or stiff

(Definition of “tension” from the Cambridge Learner’s Dictionary © Cambridge University Press)