A substance that reduces the activity of the central nervous system, leading to a calming effect. Alcohol is a common depressant that can slow down brain function and impair judgment.
A drug or agent that diminishes the function or activity of a specific body system or organ. Doctors may prescribe a depressant to help patients with anxiety or sleep disorders.
Something that lowers or discourages activity, growth, or enthusiasm. High energy costs are a significant depressant on industrial output.