Abstract This standard is a glossary of the technical terms used in the welding industry. Its purpose is to establish standard terms to aid in the communication of welding information. Since it is intended to be a comprehensive compilation of welding terminology@ nonstandard terms used in the welding industry are also included. All terms are either standard or nonstandard. They are arranged in the conventional dictionary letter-by-letter alphabetical sequence. A total of 1253 terms are defined@ and the definitions are illustrated by 53 figures. Also included are the Master Chart of Welding and Allied Processes and the Joining Method Chart with corollary classification charts.