altar -
a raised structure on which gifts or sacrifices to a god are made
structure,
construction a thing constructed; a complex entity constructed of many parts; "the structure consisted of a series of arches"; "she wore her hair in an amazing construction of whirls and ribbons"
altar -
the table in Christian churches where communion is given
An altar is any structure upon which offerings such as sacrifices and votive offerings are made for religious purposes, or some other sacred place where ceremonies take place. Altars are usually found at shrines, and they can be located in temples, churches and other places of worship. Today they are used particularly in the religions of Buddhism, Hinduism, Shinto, Taoism, as well as Christianity, LaVeyan Satanism, Thelema, Neopaganism, and in Ceremonial magic.
OmegaWiki Dictionary
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altar Table for religious ceremonies.
altar Structure higher than the floor level and used to offer one or several sacrifices.