They didn't seem to understand the 'gravity' [='seriousness'] of the situation.
He uttered the oath with proper 'gravity'. [='solemnity']
Its low 'center of gravity' makes the car very stable.
(..) - Precisely. - This is heavy. There's that word again. Heavy. Why are things so heavy in the future? Is there a problem with the Earth's gravity? The only way we're going to get them to mate is if they're alone. You've got to get them to interact... ...in some sort of social... (..)1985 Back to the Future