(From the 1930 Sellar and Yeatman parody "1066 And All That") Often capitalised; always pronounced as if capitalised.
1. Self-evidently wonderful to anyone in a position to notice: "The Trailblazer's 19.2 Kbaud PEP mode with on-the-fly Lempel-Ziv compression is a Good Thing for sites relaying netnews".
2. Something that can't possibly have any ill side-effects and may save considerable grief later: "Removing the self-modifying code from that shared library would be a Good Thing".
3. When said of software tools or libraries, as in "Yacc is a Good Thing", specifically connotes that the thing has drastically reduced a programmer's work load.
Opposite: Bad Thing, compare big win.
That, ultimately, is a good thing, but I am also grief-stricken.
Though no prison sentence for a juvenile is a good thing, at least I knew I would be released one day.
The only good thing that can be said about it is that the President seems to be too sensible to actually consider doing it.
A little fresh air could be a good thing for the grand old party, even an Arctic blast from Alaska.
And a good thing too, because we are only halfway through the Queen's Jubilee weekend.
All strange places were Nazareths, and all strangers were Nazarenes, and the cry was, ‘Can any good thing come out therefrom?’
I say you can, if you've got grit enough to make a good thing for yourself.
Some good thing, after all, could come out of this community—such was the triumphant discovery the lady's manner implied.
Labor unionism is a good thing, but it is no remedy for this condition.
It is a good thing, though, that we can give the dogs as much raw meat as they will eat; they certainly require it.