Atticus kept us in fits that evening, gravely reading columns of print about a man who sat on a flagpole for no discernible reason, which was reason enough for Jem to spend the following Saturday aloft in the treehouse.
My cheeks grew hot as I realized my mistake, but Miss Maudie looked gravely down at me.
The most ridiculous example I can think of is that the people who run public education promote the stupid and idle along with the industrious— because all men are created equal, educators will gravely tell you, the children left behind suffer terrible feelings of inferiority.
There are no more uses of "grave" in the book.
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Her smile disappeared as she suddenly realized the gravity of her situation.
It was the day of the funeral and she was in a grave mood.