GILLINGHAM, a market town of Dorsetshire, England, on the river Stour, 105 m. W.S.W. from London by the S.R. Pop. , 3,274. The church of St. Mary the Virgin has a Decorated chancel. The rich undulating district in which Gillingham is situated was a forest preserved by King John and his successors. There is a large agricultural trade, and small manufactures of bricks, etc., are carried on.