1 〔内と外〕the inside and the outside ((of a building))
内外の｜internal and external
I had my house painted inside and out.
the complicated internal and external circumstances of the company
Riots broke out in and around the town.
The incident was reported in domestic and foreign papers.
The number of people out of work is increasing both at home and abroad.
3 〔およそ〕about; around
His monthly income is 「around 250,000 yen [250,000 yen or so].
内外価格差｜a price differential between domestic and overseas markets
The building was heavily guarded inside and out.