This is not my question. It's a headline in today's Times Higher [THE].
Needless to say, it's got nothing to do with the sort of sustainability that usually features in this blog. Rather, it's about the financial viability of higher education in the UK and argues that ...
"Universities need a new funding model"
The postscript was ...
"We can't go on like this"
Indeed. "sustainable" in this instance means financially viable in the years to come, but it can mean almost what you want it to. For example, where I live, quartered safely out here in the countryside, the bus services are not sustainable. No wonder people are confused.