a market-town of Hampshire, England, 37 miles N.E. of Southampton. It stands on the N. side of a chalk down, and consists of a well-built main street and two others of smaller size. The parish church is an old brick edifice, with a square tower. There are remains of an ancient palace, and a ruined castle in which David I. of Scotland was imprisoned for eleven years. Lily the grammarian was born at Odiham in 1468. Pop. (1851) of the parish 2811.