Noah Webster's New International Dictionary of the English Language

1. (v. i.) To roll over, or to and fro; to throw one's self about; as, a person on pain tumbles and tosses.

2. (v. i.) To roll down; to fall suddenly and violently; to be precipitated; as, to tumble from a scaffold.

3. (v. i.) To play tricks by various movements and contortions of the body; to perform the feats of an acrobat.

4. (v. t.) To turn over; to turn or throw about, as for examination or search; to roll or move in a rough, coarse, or unceremonious manner; to throw down or headlong; to precipitate; -- sometimes with over, about, etc.; as, to tumble books or papers.

5. (v. t.) To disturb; to rumple; as, to tumble a bed.

6. (n.) Act of tumbling, or rolling over; a fall.