con ‧ den ‧ sa ‧ tion /ˌkɒndenˈseɪʃ ə n, -dən- $ ˌkɑːn-/ BrE AmE noun
1 . [uncountable] small drops of water that are formed when steam or warm air touches a cold surface:
There was a lot of condensation on the windows.
2 . [uncountable] technical when a gas becomes a liquid
3 . [uncountable and countable] formal the act of making something shorter