A salutation or title that does not specify the gender of the addressee in a formal communication or introduction. Also used for persons who do not identify as a binary gender, addressing someone where the gender is unknown, or if the correspondence-sender is unsure of the gender of the person to whom the correspondence is being sent. Mx. (pronounced mix) and M. are the most commonly used gender-neutral salutations (e.g. “Dear Mx. Smith…” or “Hello M. Moore…”). Generally, M. is used when the gender is unknown, and Mx. is used when the person uses that prefix.