n.
(pl. taboos or tabus)
a social or religious custom placing prohibition or restriction on a particular thing or person.
adj.
prohibited or restricted by social custom.
▸designated as sacred and prohibited.
v.
(taboos, tabooing, tabooed or tabus, tabuing, tabued)
place under a taboo.
Etymology
C18: from Tongan tabu ‘set apart, forbidden’.