1. A group, a company, a party, a body, a troop, a crowd, or a bunch: A band of students brought their grievances before the dean of the university.
2. Orchestras, an ensemble, groups: Two different musical bands played until midnight last evening.
3. A binding, a ribbon, a sash, a belt, a collar, a girdle: Daria's hair was held in place by a velvet band.

Dark bands of clouds were forming on the horizon indicating the coming of a rainstorm.

1. To unite, to join, to consolidate; to gather as a group: If the students can band together, they are convinced that they can give their complaints greater strength.
2. To attach a tag or an identification marker to an animal so its movements can be tracked: The veterinarian was careful when she was banding Mary's dog.

Amazingly, when the dog was lost as a result of a storm, it was found by Alanna some miles away and because it was banded, she was able to return the dog to Mary.

In a semiconductor, the energy difference between the highest valence band and the lowest conduction band.

The amount of energy (in electron volts) required to free an outer shell electron from its orbit about the nucleus to a free state, and thus promote it from the valence to the conduction level.

An energy band in a semiconductor in which electrons can move freely in a solid, producing a net transport of charge.

The highest energy band in a semiconductor that can be filled with electrons.