(Irregular preterit, past participle: trod, trodden).
1. To step or stomp heavily or roughly; SYN. trample.
2. To apply (the tread) to a tire.
3. To brace (an archer's bow) by pressing the foot against the center.
4. To crush as if by treading on, as of grapes.
5. To mate with, of male birds.

1. The horizontal part of a stair or step.
2. The part (as of a wheel or shoe) that touches the ground.