Real Dictionary

brute
Brute emotions or facts are basic feelings or responses to a situation, or the basic facts of this situation.
When you refer to brute strength or force, you are contrasting it with gentler methods or qualities.
countable noun: If you call someone a brute, you mean that they are rough, violent, and insensitive.

brute in American English
lacking the ability to reason

brute in American English 1
adjective: animal; not human
noun: a nonhuman creature; beast

brute in American English 2
transitive verb: to shape (a diamond) by rubbing with another diamond or a diamond chip

brute in British English
wholly instinctive or physical (esp in the phrases brute strength, brute force)
noun: any animal that is not a human; beast; lower animal