A gunlock in which powder is ignited by a match.(noun)
A musket having such a gunlock.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "matchlock" in a sentence
"Firing had ceased; to load a matchlock was a long affair, and though the attackers might have divided and come forward in relays with loaded weapons, they would have run the risk of hitting their own friends."
"A bearded ruffian, whose only costume was a flannel shirt and a pair of seedy check trousers, but whose eye was as keen as a hawk's, and whose shining "matchlock" had seventeen notches  along its stock, caught the subaltern's query."
"They were apparently fairly well supplied with them, of either the "matchlock" or "snaphance""