Lotion \Lo"tion\, n. [L. lotio, fr. lavare, lotum, to wash: cf. F. lotion. See Lave to wash.]

1. A washing, especially of the skin for the purpose of rendering it fair.

2. A liquid preparation for bathing the skin, or an injured or diseased part, either for a medicinal purpose, or for improving its appearance.

Source: Webster's Revised Unabridged Dictionary (1913)