To roll over or tumble (physically); to flop or fall about. Also used in expressions like 'to roll with laughter'.
子供が芝生の上で転げて遊んでいる。
The child is rolling around on the grass playing.
急な坂で自転車から振り落とされ、転げてしまった。
I was thrown off my bicycle on a steep slope and tumbled down.
彼の冗談に皆が笑い転げた。
Everyone rolled with laughter at his joke.
箱の中で丸い石が転げた。
A round stone rolled inside the box.