If an idea is mechanistic, it explains living things — people, animals, even the natural world — as if they were machines. A clock has parts that push other parts. A mechanistic view says nature works like that too: cause, then effect, with no extra mystery left over. You meet the word in science and philosophy, not in the playground. A teacher might say, “That is a rather mechanistic explanation of the mind.” It can sound cold, or even like a complaint: “Don’t be so mechanistic” can mean you are treating people as if they had no feelings. Though actually, scientists themselves argue about this. Some are glad to picture the body as a kind of machine, because that helps doctors. Others say a machine picture misses what life feels like from the inside. So the word is often a label in a debate, not a simple compliment.