To usurp the place of, especially through intrigue or underhanded tactics.
To displace and substitute for (another): The word processor has largely supplanted electric typewriters. See Synonyms at replace.
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.