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 (ō′pē-ĭt, -āt′)
1. Any of various analgesic, narcotic drugs derived from the opium poppy, such as morphine or codeine.
2. See opioid.
3. Something that dulls the senses and induces relaxation or torpor.
a. Containing opium or any of its derivatives.
b. Resembling opium or its derivatives in activity.
2. Inducing sleep or sedation; soporific.
3. Causing dullness or apathy; deadening.
tr.v. (-āt′) o·pi·at·ed, o·pi·at·ing, o·pi·ates
1. To subject to the action of an opiate.
2. To dull or deaden as if with a narcotic drug.

[Middle English, from Medieval Latin opiātum, from Latin opium, opium; see opium.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.