Verb
1. put down or press the foot, place the foot;
"For fools rush in where angels fear to tread""step on the brake"2. tread or stomp heavily or roughly;
"The soldiers trampled across the fields"3. crush as if by treading on;
"tread grapes to make wine"4. brace (an archer's bow) by pressing the foot against the center
5. apply (the tread) to a tire
6. mate with;
"male birds tread the females"