Word: Psychoactive Substance
Definition: A psychoactive substance is a type of drug that can change how you feel, think, or perceive things. These substances can affect your mood (how you feel) and may alter your senses (how you see, hear, or feel things).
While "psychoactive substance" generally refers to drugs, in a broader sense, it can also be used to describe any substance that has a significant impact on mental processes, whether legal or illegal.
It's important to remember that while some psychoactive substances are legal (like caffeine and alcohol), others are illegal and can be harmful.