v. 1 intr. (of a secret or something unknown) leak out; come to be known. 2 intr. disp. a (prec. by it as subject) turn out; prove to be the case (it transpired he knew nothing about it). b occur; happen. 3 tr. & intr. emit (vapour, sweat, etc.), or be emitted, through the skin or lungs; perspire. 4 intr. (of a plant or leaf) release water vapour. transpirable adj. transpiration n. transpiratory adj.
[ F transpirer or med.L transpirare (as TRANS-, L spirare breathe) ]