It appears that the BBC welsh dictionary and geiriadur.net are down/gone 
Has it been replaced by http://welsh-dictionary.ac.uk
My world is crumbling 
There seems to be shifting and changing going on - there was another similar thread recently:
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Yeah. Then it came back. And, as Stephen says, now it’s gone again. We surely live in the end times. Or maybe there’s just a bit of jiggling around occuring. One of the two. 
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Feels like the end times, maybe the fact that I’m listening to the smiths is contributing to that.
Well the BBC dictionary is back at least! I’ll come down off the ledge now.
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Looks like someone at Drindod Dewi Sant forgot to renew the www.geiriadur.net domain!
Either that or the original maintainers have left/moved on and nobody knows or cares any more. That’d be sad 
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