Definition of turf | Bee Dictionary of English

n surface layer of ground containing a mat of grass and grass roots
n the territory claimed by a juvenile gang as its own
n range of jurisdiction or influence
a bureaucracy...chiefly concerned with turf...and protecting the retirement system
v cover (the ground) with a surface layer of grass or grass roots

A rash of injuries is again focusing attention on the safety of artificial turf.
To test the durability of different varieties, technicians at Britain's Sports Turf Research Institute put a tennis shoe on a massive hydraulic ram and then stomped patches of turf .
Visitors like Brett Favre get a taste of the turf woes at Giants Stadium, where the Jets and the Giants play.

Beulah: Tsunaami Stu goes turf to dirt seeking repeat in Sydney Gendelman Memorial
Tsunaami Stu upset last year’s Sydney Gendelman Memorial Stakes for Ohio-breds when it was contested on turf at River Downs. On Sunday, the $50,000 Gendelman will be run on the dirt at Beulah Park, and Tsunaami Stu will be a longshot again.
June 14, 2013 - Daily Racing Form
HandiGambling Hollywood Turf
The HandiGambling exercise for Friday, June 14 is the eighth race at Betfair Hollywood Park, a $25,000 claimer for fillies and mares at 1 1/16 miles on turf.
June 14, 2013 - Daily Racing Form
Santa Anita renovating turf club, grandstand
Santa Anita is planning renovations to its turf club, grandstand and stable area during the second half of the summer, track president George Haines said on Thursday.
June 13, 2013 - Daily Racing Form

Barack Obama in Washington Post
At least on the basketball court I could find a community of sorts, with an inner life all its own,Obama wrote. "It was there that I would make my closest white friends, on turf where blackness couldn't be a disadvantage."
MatjaÅ¾ Kek in Los Angeles Times (blog)
I do not agree with this turf,Kek said. "It's no excuse, it's the same for Algeria as well. But it is a different game on this surface."
Tom Coughlin in The Associated Press
To come in here and have a chance to work on the turf and check the wind out, it's a different venue from Giants Stadium,he said. "This was a good experience to come in here. I'm glad we did this on a beautiful spring day. It's just a...