齋祭

to offer sacrifices (to gods or ancestors) whilst abstaining from meat, wine etc

to fast or abstain from meat, wine etc / vegetarian diet / study room / building / to give alms (to a monk)

surname Zhai

to offer a sacrifice to (gods or ancestors) / memorial ceremony / (in classical novels) to recite an incantation to activate a magic weapon / (lit. and fig.) to wield