tread

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tread

1. the outer part of a tyre or wheel that makes contact with the road, esp the grooved surface of a pneumatic tyre
2. the part of a rail that wheels touch
3. Vet science an injury to a horse's foot caused by the opposite foot, or the foot of another horse
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

tread

1. The horizontal upper surface of a step; includes the rounded edge or nosing which extends over the riser.
See also: Step
2. The horizontal upper surface of a step; includes the rounded edge or nosing which extends over the riser.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

tread

[tred]
(civil engineering)
The horizontal part of a step in a staircase.
The distance between two successive risers in a staircase.
(engineering)
The part of a wheel or tire that bears on the road or rail.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

tread

The horizontal surface of a step; often has a rounded edge that extends beyond the upright face of the riser below it.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
Answers will vary but should be similar to: As I jumped off the diving board into the swimming pool, I realized that I didn't know how to tread water.
He added: "To wear a smaller jacket would mean that they would be sitting a lot lower down in the water so, depending on the weight of the person, they may have to tread water to keep their mouth and nose clear of the water."
Harewood is big and strong and will irritate defences, while Reo-Coker will add some much-needed quality to midfield, but at the end of the day last season's squad was not good enough to do more than survive and while the top clubs have moved on Villa seem content to do little more than tread water.
Certainly what I've done, personally, is tread water for another year.
It's shell's weight/causes frantic arms/and legs to tread water./It cranes its wrinkled neck; and tough two-holed nose//above the surface of the waves/into air.
More than swimming, I learned how to tread water. I've been treading water ever since.
Some win big, some lose big, some merely tread water, but all come away wondering why stock prices move the way that they do.
Don't tell him you love Slipknot when you're into Jessica Simpson or that you're an avid water-skier if you can barely tread water. You'll wind up miserable at a metal concert or drowning in the deceit when he's eventually on to you.
Not when two hours out of production to learn what one simply must know to tread water in an ever-changing world is held, by too many bosses, to be unacceptable.
Businesses that remain open tread water. Rosaly Rodrigues, a manager of the ABC House restaurant and club, looks wistfully through the empty club out the doors to the bare streets.
Despite strong bipartisan support, the involvement of faith-based organizations in assisted living conversion and a continuing budget surplus, the administration has chosen to tread water for Section 202 funding.