What is mechanical?

* * S: (adj) mechanical (using (or as if using) mechanisms or tools or devices) "a mechanical process"; "his smile was very mechanical"; "a mechanical toy" * S: (adj) mechanical, mechanically skillful (relating to or concerned with machinery or tools) "mechanical arts"; "mechanical design"; "mechanical skills" * S: (adj) mechanical (relating to or governed by or in accordance with mechanics) "a belief that the universe is a mechanical contrivance"; "the mechanical pressure of a strong wind"