See example at Seventh-Day.
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British Dictionary definitions for seventh-day adventists
Protestant theol a member of that branch of the Adventists which constituted itself as a separate body after the expected Second Coming of Christ failed to be realized in 1844. They are strongly Protestant, believe that Christ's coming is imminent, and observe Saturday instead of Sunday as their Sabbath
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Culture definitions for seventh-day adventists
A denomination of Christians (see also Christian) who proclaim that the Second Coming of Jesus will occur in the very near future. Unlike practically all other Christians, they observe Saturday, rather than Sunday, as a Sabbath.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.