Gloves are essentially a garment which covers the entire hand. They have separate openings for each finger to fit into. However, there are variations to this model. Those which have just one large opening for the entire palm are called mittens. Mittens are generally good in keeping warm, while gloves are good where the use of the individual finger does not have to be compromised.
In almost any profession, sport or even in every home gloves find a place. Their material tends to differ. For instance, in the medical field, gloves for lab work tend to be made of latex or nitrile rubber which are disposed off after usage, at home, for keeping warm, gloves are generally made of wool, while in a sport like boxing they may be made of Leather with a cotton/fabric padding.
There is a new type of glove called the glovelettes . These do not cover the fingers entirely and the ends of the fingers are let free. Essentially used by skateboarders and bikers, the purpose is to provide protection to the palm, without loss of grip at the same time.
Glove being a first line of defence for the hand, it is essential that people using them ensure that they are the correct size and type for their work, as using gloves different from their meant use can be more of impairment than a help.