Definition of "politeful"

Well the Aboriginals are trying to step forward a little but in a lot of ways the white man is still keeping them down, in a politeful sort of way.

1992, Bruce Shaw, When the Dust Come in Between, page 149

Geronimo passed Steve a cup of something that reeked of scrapings off a smoker's throat marinated in a jogger's underpants. His stomach hid behind a kneecap as he braved a politeful sip.

2012, Joey Ashley, Beyond Isness