What is the meaning of the word "band"?

Definitions:

a stripe or stripes of contrasting color noun
- chromosomes exhibit characteristic bands
a thin flat strip of flexible material that is worn around the body or one of the limbs, especially to decorate the body noun
- I wore a band around my waste, which was in fashion at the time.
to attach a ring to the foot of, in order to identify verb
- We banded the baby birds before returning them to the nest.
to bind or tie together, as with a band verb
- I banded the lobster's claws after we caught it.