Wiktionary (English) • 2026
Wiktionary contributors (https://en.wiktionary.org/wiki/controlled_substance#English) • CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/) • via Kaikki (https://kaikki.org/dictionary/English/)
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A drug or chemical whose use, possession, manufacture, or sale is regulated or banned by the government.
