|Origin:||tumb 'to dance, perform as a tumbler' (11-14 centuries), from Old English tumbian|
1 [always + adverb/preposition]
to fall down quickly and suddenly, especially with a rolling movement
She lost her balance and tumbled backwards.
A few stones came tumbling down the cliff.
2 [always + adverb/preposition]
to move in an uncontrolled way
tumble into/through/out etc
We tumbled out into the street.
if prices or figures tumble, they go down suddenly and by a large amount:
Oil prices have tumbled.
Mortgage rates tumbled to their lowest level for 25 years.
4 [always + adverb/preposition] literaryHBH
if someone's hair tumbles down, it is long, thick, and curly:
Her long dark hair tumbled over her shoulders.
if words tumble out of someone's mouth, they speak very quickly because they are excited or upset
The words tumbled out as if he hardly knew what to say first.
6 [always + adverb/preposition]
if water tumbles somewhere, it flows there quickly:
A narrow stream tumbled over the rocks.
if something comes tumbling down, it falls suddenly to the ground:
Removing the debris could cause the rest of the building to come tumbling down.
if a system, problem etc comes tumbling down, it suddenly stops working or existing:
In the last year, barriers have come tumbling down.
8 American EnglishDSO
to do tumbling