sail ‧ ing /ˈseɪlɪŋ/ BrE AmE noun
1 . [uncountable] 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] a time when a ship leaves a port:
Luckily, there was another sailing at 2 o'clock.
⇨ be plain sailing at ↑ plain 1 (9)