From Longman Dictionary of Contemporary Englishbe spoken forbe spoken fora) MARRYif someone is spoken for, they are married or already have a serious relationship with someone b) KEEP/STOREif something is spoken for, you cannot buy it because it is being kept for someone else → spoken
Examples from the Corpus
be spoken for• But all of the money is spoken for.• Contest ends when all tickets are spoken for.• Most of your capital is spoken for, and the creditors are closing in.• Though they were spoken for my benefit, I could not be assumed to share the same norms.• When the words were spoken for the third time, however, the divorce was irrevocable. 