opiate

The definition of opiate is something related to opium, an addictive narcotic made from the poppy, or is something that makes you sleep or dazed.

(adjective)

Heroin is an example of a drug that would be described as an opiate drug.

An opiate is defined as an addictive drug made from the opium poppy that has morphine-like, soothing effects.

(noun)

The drug heroin is an example of an opiate.

See opiate in Webster's New World College Dictionary

noun

any drug containing opium or any of its derivatives, and acting as a sedative and narcotic
anything tending to quiet, soothe, or deaden

Origin: ML opiatum: see opium

adjective

transitive verb opiated, opiating

See opiate in American Heritage Dictionary 4

noun

Any of various sedative narcotics containing opium or one or more of its natural or synthetic derivatives.
A drug, hormone, or other chemical substance having sedative or narcotic effects similar to those containing opium or its derivatives: a natural brain opiate. Also called opioid.
Something that dulls the senses and induces relaxation or torpor.

adjective

a. Containing opium or any of its derivatives.
b. Resembling opium or its derivatives in activity.
Inducing sleep or sedation; soporific.
Causing dullness or apathy; deadening.

transitive verb (-ātˌ) o·pi·at·ed, o·pi·at·ing, o·pi·ates