“Just what does this job 'involve'?” “It 'involves' [='entails'] traveling and a lot of overtime.”
No one knew of their romantic 'involvement'. [=no one knew that they had a romantic relationship]
The accident 'involved' three cars. = Three cars were 'involved' in the accident.
(..) and I can move the Earth. It's just a matter of... I don't have this. Archimedes would be so proud. Do you have any ideas? Yes, but they all involve a green lantern and a power ring. Easy... easy. Now we've got an inclined plane. The force required to lift is reduced by the sine (..)2007 TvShow: The Big Bang Theory Title: The Big Bran Hypothesis Season: 1 Episode 2