Noun

1. A moderate and proportionable mixture of elements or ingredients in a compound; the condition in which elements are mixed in their proper proportions.
2. Any state or condition as determined by the proportion of its ingredients or the manner in which they are mixed; consistence, composition; mixture.
3. a person's normal manner of thinking, behaving or reacting
4. a tendency to become irritable or angry
5. the altering of certain intervals from their correct values in order to improve the moving from key to key