Functioning particularly effectively; achieving something substantial.
With the updated software, I was really cooking with gas. I got the project done in half the time.
Used other than figuratively or idiomatically: see cook, with, gas.
able to "pass", or be accepted as a member of a race, sex or other group to which society would not otherwise regard one as belonging.
That may be passed or traversed.
Tolerable; adequate; no more than satisfactory.