From Longman Dictionary of Contemporary Englishsailingsail‧ing /ˈseɪlɪŋ/ noun 1 
[uncountable]DLODSO the sport or activity of travelling in or directing a small boat with sails Bud has invited us to go sailing this weekend.2 [countable]TTW a time when a ship leaves a port Luckily, there was another sailing at 2 o'clock. → be plain sailing at plain1(9)
[uncountable]DLODSO the sport or activity of travelling in or directing a small boat with sails Bud has invited us to go sailing this weekend.2 [countable]TTW a time when a ship leaves a port Luckily, there was another sailing at 2 o'clock. → be plain sailing at plain1(9)Examples from the Corpus
sailing• Dinghy sailing can be exhilarating and exhausting, exciting and relaxing, competitive and rehabilitating - all at the same time.• Evening brief on free sailing in the Symi gulf.• Quite a few people choose to travel in groups of two or three yachts while free sailing.• Below the bolt, the strip had smooth sailing again all the way to the boor.• He knew nothing about blue water sailing.go sailing• I've often taken a board and gone sailing in Poole Harbour, the second largest natural harbour in the world.• Audrey plays competitive squash and Victoria plays badminton as well as going sailing.• Visitors to the resort can go sailing in the clear waters off the island.• Besides, I believe you can go sailing all year.• Raymo watched the hat go sailing off his head when they shot him.• Brnger and Philpot have gone sailing and mountain biking.• The Owl and the Pussycat, who are in love, went sailing.• How was it that she went sailing, like a human version of their brass vase, out the bedroom window?• She rates these days as the kind in which you least mind having to go sailing with your parents. 