v. t.
v. i. To take fire; to begin to burn. [ 1913 Webster ]
adj. set afire or burning.
n.
a. Capable of being ignited. [ 1913 Webster ]
n. [ Cf. F. ignition. ]
n. One who, or that which, produces ignition; especially, a contrivance for igniting the powder in a torpedo or the like.