Letters are regarded as a market in terminal decline because of the unrelenting growth of other forms of communications, such as email and texting.
Times, Sunday Times
Injection marks all over his body and the disfigurement caused by years of plastic surgery show he'd been in terminal decline for years.
The Sun
Otters seemed to be in terminal decline, but now they're present in every county.
Times, Sunday Times
For the past few years scientists have feared that it was running out of steam and was even in terminal decline.
Times, Sunday Times
This sounds like a school in terminal decline.
Times, Sunday Times