The phrase "stellar season" means having an outstanding or impressive performance or success in a specific period of time, typically referring to sports or a specific activity. Full definition
An elegant former left - winger with a superb left foot, Grosso paid the price for a less than stellar season with Juventus, where he was unable to pin down a regular first - team place amid competition from 23 - year - old Paolo De Ceglie. (tomwfootball.com)
The Portugal international has enjoyed another absolutely stellar season for club and country and is now rightly considered to be one of the favourites to win the prestigious individual award for what would only be the second - ever time in the 28 - year - old's career. (caughtoffside.com)