FORMALIZE

Definition:

1. [verb] make formal or official; "We formalized the appointment and gave him a title"
   Synonyms: formalise
   
   
2. [verb] declare or make legally valid
   Synonyms: validate, formalise
   
   

Synonyms:

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Related Words:

• ritualize, ritualise
• sign, ratify
• co-sign, cosign
• probate