- To exercise authoritative or dominating influence over; direct. See Synonyms at conduct. (verb-transitive)
- To adjust to a requirement; regulate: controlled trading on the stock market; controls the flow of water. (verb-transitive)
- To hold in restraint; check: struggled to control my temper. (verb-transitive)
- To reduce or prevent the spread of: control insects; controlled the fire by dousing it with water. (verb-transitive)
- To verify or regulate (a scientific experiment) by conducting a parallel experiment or by comparing with another standard. (verb-transitive)
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.