1 [no object] formal : to happen

• They wouldn’t say what had transpired [=taken place] at the meeting.
• No one will soon forget the historic events that transpired on that day.

2 [no object] formal : to become known — usually used with it

• Her name, it transpired, was false. [=(less formally) it turned out that her name was false]
• It transpired that they had met previously. [=we found out that they had met previously]

3 technical, of a plant : to have water evaporate from the surface of leaves

[no object]

• A plant transpires more freely on a hot dry day.

[+ object]

• Trees transpire water at a rapid rate.