An Aticāra (partial transgression) of the fourth vow of the lay follower (viz., chastity);
to indulge in sexual intercourse with a prostitute or other's spouse.
'apariggahiyāgamaṇe'tti aparigṛhītā nāma veśyā anyasatkā parigṛhītabhāṭikā kulaṅganā vā anātheta.
(Upā 1.35 Vṛ p.13)