• WordNet 3.6
    • v sideline remove from the center of activity or attention; place into an inferior position "The outspoken cabinet member was sidelined by the President"
    • n sideline an auxiliary activity
    • n sideline an auxiliary line of merchandise
    • n sideline a line that marks the side boundary of a playing field
    • ***
Webster's Revised Unabridged Dictionary
    • Sideline A line of goods sold in addition to one's principal articles of trade; a course of business pursued aside from one's regular occupation.
    • Sideline A line pertaining or attached to the side of a thing.
    • Sideline A secondary road; esp., a byroad at right angles to a main road.
    • Sideline Specif., a line for hobbling an animal by connecting the fore and the hind feet of the same side.
    • ***
Century Dictionary and Cyclopedia
    • n sideline A line pertaining or attached to the side of something; specifically, in the plural, lines by which the fore and hind feet on the same side of a horse or other animal are tied to prevent straying or escape.
    • n sideline A line or course of business aside from or additional to one's regular occupation.
    • sideline To hobble, as a horse.
    • n sideline In foot-ball, hockey, and similar games, a line defining the limit of play on the side of the field, and outside of which the ball is out of bounds.
    • ***


  • Lewis Lehr
    Lewis Lehr
    “The entrepreneurial approach is not a sideline at 3M. It is the heart of our design for growth.”
  • Shirley Anita Chisholm
    Shirley Anita Chisholm
    “You don't make progress by standing on the sidelines, whimpering and complaining. You make progress by implementing ideas.”


In literature:

Wood, who was also Keeper of the Capital Prison, had a sideline as a counterfeiting expert, bagging boodlers for the federal bounty money.
"Hacker Crackdown" by Bruce Sterling
It was a sideline with Him.
"Commentary on the Epistle to the Galatians" by Martin Luther
The average subject is handled standing and can be restrained with a twitch, sideline and hood.
"Lameness of the Horse" by John Victor Lacroix
What the various pairs Of curved sidelines mean, I am unable to say.
"Unknown Mexico, Volume 1 (of 2)" by Carl Lumholtz
His total grasp of even the sideline issues was still dim.
"The Fourth R" by George Oliver Smith
It seemed that the sideline of mountain-tops had a little light on them.
"Wandl the Invader" by Raymond King Cummings
If some interesting sideline crops up, they can't investigate it.
"Security" by Poul William Anderson
At one time it was discovered that Craig, reinforced by enthusiastic onlookers from the sidelines, had seventeen men in his team.
"The Grammar School Boys of Gridley" by H. Irving Hancock
Even then he had enough surplus energy to run a sideline in literature.
"A Circuit Rider's Wife" by Corra Harris
From the sidelines it seemed as though they were wrestling with an invisible octopus.
"Greener Than You Think" by Ward Moore

In news:

I've already referred to Detroit Lions coach Jim Schwartz as a "sideline madman" this season.
Newark's Micah Wright speeds down the Pal-Mac sideline enroute to a 60-yard touchdown run after picking off Pal-Mac quarterback Stephen Morrell.
When Barack Obama posted Jon Huntsman to Beijing, it looked like a crafty way to sideline a 2012 rival.
Anthony Williams watched the speechifying at the DC voting-rights march this afternoon from the sidelines.
Conditions at Lexington, Blue Grass Airport, KY. Back to Sidelines.
Just as fast, he was sidelined by a knee injury that will keep him out for quite a while.
As Buffalo Bills punter Brian Moorman (8) sits on the sidelines during an NFL football game against the New York Jets at MetLife Stadium Sunday, Sept 9, 2012, in East Rutherford, N.J.
Andy Reid on the sidelines against the Washington Redskins, possibly consulting his 'handbook'.
The NCAA Division III playoffs will open Saturday at Trinity Football Stadium with a familiar face on the sidelines for the visiting team.
Hamstring injury sidelines Tush, Oliva battles knee pain, but 'Cats still turn in solid performances.
He should be feeling that itch to get back on the sideline again, shouldn't he.
(MCT) – Winning can defuse any burgeoning sideline controversy and shift the focus to the play on the field, where the Bears have improved to 3-1 after Monday night's thrashing of the Cowboys.
Miami Dolphins quarterback Ryan Tannehill (17) watches from the sidelines at MetLife Stadium in East Rutherford, New Jersey on October 28, 2012.
It's what you'll find at Fayetteville's Limestone Art & Framing Gallery, as the gallery branches into a sideline business: selling Ultra Motors e-bikes.
I was talking to Patrick Holmes on the sidelines at a recent BHHS girls soccer game – they were winning 5-0 at the time – about the upcoming NBA season.

In science:

For the time being, instead of waiting in the sidelines for that to happen, statisticians should get into the field of play.
Quantum Computation and Quantum Information
The trigonometry of the two constant curvature counterparts of the special relativity spacetime, mentioned as a short term first aim of this work, follows as a sideline byproduct.
Trigonometry of spacetimes: a new self-dual approach to a curvature/signature (in)dependent trigonometry
These are the astrogeological era of meteorite discovery, the high energy era of particle detectors, and the photon astronomy era of microwave, sub–mm and infrared telescopes, sidelined by a few niche experiments at optical wavelengths.
The History of Astrophysics in Antarctica
They open up slowly like a contour of a flower whose sidelines then gradually evolve into typical for each type of a system pitchfork bifurcation branches.
Discrete Thermodynamics of Chemical Equilibria
Open-charm and charmonium studies are an active sideline.
Charm physics at Belle