airline discounts for 'mature' travelers [=for senior citizens who travel; for old people who travel]
The dog will stand three feet tall when (it has become) 'mature'. [=when it has matured]
After/On 'mature' reflection, he concluded that he had been mistaken.
(..) Oh, that's just Dustin. He farted. - Dustin farted. - Okay. - Dustin farted. - Very mature, Lucas. Oh. - Will. - Shut up. - Come on. - Dustin farted! (..)2016 TvShow: Stranger Things Title: Chapter Eight: The Upside Down Season: 1 Episode 8