(also tabu)
¦ noun (plural taboos or tabus) a social or religious custom placing prohibition or restriction on a particular thing or person.
¦ adjective prohibited or restricted by social custom.
?designated as sacred and prohibited.
¦ verb (taboos, tabooing, tabooed or tabus, tabuing, tabued) place under a taboo.
Origin
C18: from Tongan tabu 'set apart, forbidden'.