verb
tumbles; tumbled; tumbling
[no obj]
to fall down suddenly and quickly
to fall forward while turning over
to fall or drop suddenly in amount, value, etc.
always followed by an adverb or preposition :to move in a fast, confused, or uncontrolled way
to roll or turn your body across the ground or through the air while performing a series of athletic movements
of hair :to fall or hang down loosely
tumble to
[phrasal verb]
tumble to (something) Brit informal :to understand or become aware of (something)
noun
plural tumbles
[count] an act of falling or tumbling
an athletic movement in which you roll or turn your body across the ground or through the air