ˌbetter ˈoff BrE AmE adjective [no comparative]
1 . having more money than someone else or than you had before OPP worse off :
She’ll be about £50 a week better off.
⇨ ↑ well-off (1)
2 . happier, improved, more successful etc OPP worse off
better off with/without
I think she’s better off without him.
be better off doing something (=used to give advice or an opinion)
He’d be better off starting with something simpler.