Entry 1 sense Webster, 1913 Locksmith /läk'-smĭthˌ/ · Lock·smith · IPA /ˈlɑksmɪθ/ 01 n. A person whose occupation is to make, mend, or install locks, or to make keys for locks. 1. A person whose occupation is to make, mend, or install locks, or to make keys for locks.