1.
If an event is ~, it will happen very soon. (OLD-FASHIONED)
The end of the world may be ~, but do we really care?...
ADV: be ADV
see also well-~
2.
Nigh on an amount, number, or age means almost that amount, number, or age. (OLD-FASHIONED)
I had to pay ~ on forty pounds for it.
= nearly
PHRASE: PHR amount