The term AD MOTTO is an abbreviation for the Latin phrase 'Anno Domini Motto, ' which translates to 'in the year of our Lord's motto.' This phrase is often used as a SLOGAN or motto to express a sentiment or belief. It is commonly used in religious contexts, but can also be used in secular contexts. The six-letter solution SLOGAN is a synonym for motto, and is used to express a sentiment or belief in a concise and memorable way.