As a Verb or Adjective: 1. To show that an action or decision is reasonable or necessary. English = justify Note: 1. The signer in the video is giving a definition in Auslan for the English term JUSTIFY. There appears to be no commonly used Auslan sign for JUSTIFY (but some signers represent this visually using depicting signs, once they have established the topic). If you know a sign for JUSTIFY used by you or other Auslan users (deaf people or interpreters) please go to "Report missing sign" and supply details. Thank you.