One definition:
For the purposes of this chapter, the term 'amenity grass' is used to describe grass that has a recreational, functional or aesthetic value and is subject to human trampling and at least some routine management. The term 'turf grass' is used to describe amenity grass that receives a high level of management, including regular close mowing. Thus, turf grass has a high 'value' and control measures for pests and diseases of amenity grass are mainly directed at turf grass. The total area of amenity grassland in the UK is 0.35 million ha, of which about 15% is turf grass.
https://books.google.com/books?id=rxw5JvD7MN4C&pg=PA97&lpg=P...
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Note added at 39 mins (2015-10-10 18:54:40 GMT)
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Trawy gazonowe to trawy przeznaczone na trawniki. Nazwa gazon pochodzi od francuskiego le gazon
http://www.polskasites.com/www/rolimpexnasiona.pl/
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Managed amenity turf is defined as „„areas that are frequently
mown and intensively managed including fields used for turf
production, sports turf and golf greens, tees and fairways‟‟


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życica trwała (Lolium perenne L.) i wiechlina łąkowa (Poa pratensis L.) s¹ podstawowymi gatunkami traw stosowanymi na trawniki.

In the experiment two amenity grass species i.e.: perennial ryegrass (Lolium perenne) and smooth-stalked meadowgrass (Poa pratensis) under two type of turf maintenance: park and relax were subjected to estimations

http://www.au.poznan.pl/ptl/!pdf/Lakarstwo w Polsce nr 9.pdf