A jet or current of water or vapour directed upon some part of the body to benefit it medicinally (especially when used as a "too-late" contraceptive method.)"
irrigation with a jet of water or medicated solution into or around a body part (especially the vagina) to treat infections or cleanse from odorous contents
To douche means to wash the vagina using a stream of water. Never douche if you are pregnant. a mixture of water and something such as vinegar, that a woman puts into her vagina to wash it, or the object that she uses to do this (doccia )
A douche is a method of washing the vagina using a stream of water. You also refer to the object which you use to wash the vagina in this way as a douche
{i} stream of water used to cleanse various parts of the body (for medical or hygienic purposes)