An altar promise is a solemn commitment made between two people in front of an altar. It is usually made during a religious ceremony and is often referred to as a VOW. The most common words used to describe an altar promise are 'honor', 'VOW' and 'ido'. Honor is a five letter word meaning to show respect for someone or something, while VOW is a three letter word meaning a solemn promise. Ido is also a three letter word and is the traditional Jewish term for a marriage ceremony.