The term "mare" has multiple meanings depending on the context. Here are the different definitions:

• A mare is an adult female horse or other equine animal, usually over the age of three. Mares carry their young, called foals, for approximately 11 months from conception to birth.
• In Thoroughbred horse racing, a mare is defined as a female horse more than four years old.
• Fermented mares milk, known as kumis, is the national drink of Kyrgyzstan.
• Pregnant mares urine is the source of the active ingredient in the hormonal drug Premarin.
• In astronomy, a mare is any of several mostly flat dark areas of considerable extent on the surface of the moon or Mars.
• In slang, "mare" can be used as a derogatory term for a woman.
• "Mare" can also refer to a difficult or unpleasant situation or experience.

It is important to note that the most common definition of "mare" is an adult female horse or other equine animal.