(1):

(n.) An explosive whose action is practically instantaneous.

(2):

(n.) A case containing detonating powder, the explosion of which serves as a signal, as on railroads.

(3):

(n.) Something used to detonate a charge, as a detonating fuse.

(4):

(n.) A gun fired by a percussion cap.

(5):

(n.) One that detonates

(6):

(n.) One who, or that which, detonates.