FIRELOCK Meaning of FIRELOCK in English ˈ ̷ ̷ˌ ̷ ̷ noun 1. : a gunlock employing a slow match to ignite the powder charge ; also : a gun having such a lock2.a. : flintlockb. : wheel lock Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012