leave someone at the altar
To abandon a prospective spouse by deciding not to get married at the last minute.
ADJ
high, main | makeshift, portable | sacrificial
VERB + ALTAR
approach, go up to
The groom went up to the altar and waited nervously for his bride to arrive.
ALTAR + NOUN
boy | cloth, frontal | rail | table
PREP
at an/the ~
The bride and groom exchanged their vows at the altar while their families watched.
before an/the ~
The bride walked slowly down the aisle toward the altar where her groom was waiting.
on an/the ~
The priest laid flowers on the altar before the wedding ceremony began.