A keyless lock operated by a series of pushbuttons.    From Wordnet, Princeton University. 

Adjective : a keyless lock operated by a series of push buttons.    From Dictionary.com. 

And amid the cremation of her keyless-imprisoned soul.    From Wordnik.com.  [Woman of Her Quest] Reference

I heard it has power windows and remote keyless entry.    From Wordnik.com.  [LARRY THE CABLE GUY BOUGHT A NEW TRUCK] Reference

He presses the keyless entry and the door chimes for him.    From Wordnik.com.  [Land of the Blind]

"We have the combination to your keyless entry," he says.    From Wordnik.com.  [unclebob Diary Entry] Reference

"Who is it?" asked the little girl, in a flat, keyless tone.    From Wordnik.com.  [Janice Day at Poketown] Reference

The car we rented was a newfangled jobbie with keyless ignition.    From Wordnik.com.  [Keyless entry : Bev Vincent] Reference

Far enough away that the normal keyless entry can still lock it.    From Wordnik.com.  [Turn A Nike+ Sensor Into A Keyless Car Entry System | Lifehacker Australia] Reference

CALLUM: Well, actually, it's keyless entry and keyless ignition.    From Wordnik.com.  [CNN Transcript Dec 14, 2004] Reference

GONSALVES: This particular home will have a keyless entry for him.    From Wordnik.com.  [CNN Transcript Dec 24, 2004] Reference

Toyota offers keyless starting on its Camry, Avalon and Highlander.    From Wordnik.com.  [Starting a Car With a Push of a Button] Reference

So there is this little device that looks like a car's keyless remote.    From Wordnik.com.  [CNN Transcript May 18, 2007] Reference

Electric "Chamberlain" Security garage door opener, wireless and keyless.    From Wordnik.com.  [ESTATE LIQUIDATION-to be sold to the highest bidder.] Reference

He hit the keyless remote, unlocking the doors, then opened hers for her.    From Wordnik.com.  [The Maverick]

Great consipiracy theories about the failure of keyless remotes and US battleships.    From Wordnik.com.  [Boing Boing: March 25, 2001 - March 31, 2001 Archives] Reference

He depressed the keyless entry button but didn't go around to open the passenger door for her.    From Wordnik.com.  [The Alibi]

It was a small black device similar in looks and size to the keyless door remotes sold with cars.    From Wordnik.com.  [Consent to Kill]

This design concept for a mechanical lock could be the ideal solution to the keyless lock problem.    From Wordnik.com.  [The Illuminating Door Handle] Reference

He could install anything ... keyless entry, remote start, flip-down LCD DVD players ... anything.    From Wordnik.com.  [Projects You Shouldn’t Try To DIY | Lifehacker Australia] Reference

The standard keyless entry, it seems, keeps the car in "standby" mode even with the engine shut off.    From Wordnik.com.  [Just in: 2011 Jaguar XJL - Frustrations already] Reference

Other standard features include power heated mirrors, power door locks, power windows, and remote keyless entry.    From Wordnik.com.  [Pricing: 2010 Hyundai Elantra goes Blue] Reference

At the 2008 International Builders' Show, my colleagues and I encountered many companies displaying keyless locksets.    From Wordnik.com.  [Buzzword: Biometrics] Reference

Whoever was outside had presumably been either keyless or reassured: in either case it played havoc with my breathing.    From Wordnik.com.  [Come To Grief]

The Lexus that Saylor was driving had a keyless ignition, which uses a start/stop button to start and stop the engine.    From Wordnik.com.  [More than floor mats: NHTSA report gives more details on Lexus crash] Reference

This means no air conditioning, no keyless entry or central door locks, no power windows and no stereo, not even a radio.    From Wordnik.com.  [Small-Car Tweaks Pay Off] Reference

Nissan The Versa 1.6 has no air conditioning, no keyless entry or central door locks, no power windows and no stereo or radio.    From Wordnik.com.  [Nissan Versa 1.6 and Chevy Cobalt XFE] Reference

I can't think of another car with keyless start that requires taking such meticulous steps after parking, but there may be some.    From Wordnik.com.  [Just in: 2011 Jaguar XJL - Frustrations already] Reference

Apparently, it turns out, at least some of them may not have been able to, not quickly, because they had keyless ignition systems.    From Wordnik.com.  [May « 2010 « L.E. Modesitt, Jr. – The Official Website] Reference

Toyota says it is considering redesigning its keyless ignition systems to offer a faster way to turn off their cars in an emergency.    From Wordnik.com.  [Can Drivers Handle High-Tech Cars?] Reference

That as a competent keyless citizen he had proceeded energetically from the unknown to the known through the incertitude of the void.    From Wordnik.com.  [Ulysses] Reference

That gets a fairly well equipped car, with 10 air bags, stability control, OnStar, air conditioning, power amenities, and keyless entry.    From Wordnik.com.  [First Look video: 2011 Chevrolet Cruze] Reference

One other consideration: I truly like the keyless start system in the Altima and the interior seems more contemporary than the Accord's.    From Wordnik.com.  [Personal Picks: Family sedans, part 1] Reference

The base model is equipped with a tilt-and-telescope steering wheel, electronic parking brake, auto headlights, and remote keyless entry.    From Wordnik.com.  [Pricing: 2010 Subaru Legacy] Reference

For instance the category “Power Equipment” includes keyless entry, dashboard warning lights, tire-pressure monitor, and other things.    From Wordnik.com.  [Detailed Reliability data pinpoints problems] Reference