Verb
(informal) To make someone retire, especially due to advancing age.
Synonym: put out to grass
They've put John out to pasture and replaced him with someone who's got half his experience.
(informal) To discontinue something.
That version of the program has been put out to pasture.
Used other than figuratively or idiomatically: see put out, to, pasture.
Source: en.wiktionary.orgI do resent that when you're in the most cool, powerful time of your life, which is your 40s, you're put out to pasture. I think women are so much cooler when they're older. So it's a drag that we're not allowed to age. Rosanna Arquette
I was at the pinnacle of my career one day and the next day I was put out to pasture. I felt like a race horse with a broken leg. Jack Klugman
We shouldn't be put out to pasture just because we've reached somebody's idea of retirement, which was certainly happening in Australia, and I think elsewhere as well. John Noble
Very few fighters get the consideration of racehorses, which are put out to pasture to grow old with dignity and comfort when they haven't got it anymore. Budd Schulberg
Should be put out to pasture like an old mare with a gammy hoof. Source: Internet
UK public services are already suffering and British civil servants could be put out to pasture by Brussels. Source: Internet