dominant

Definitions:

Having the power or rule; possessing the ascendancy; prevailing.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (adjective) (adj.) (adjective)
In music, the note which is a fifth from the tonic- thus, if the key or tonic be C, the dominant is G.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (noun) (n.) (noun)
( music) The fifth note of the scale in its relation to the first and third.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (noun) (n.) (noun)
Exercising chief authority or control; ruling.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (adjective) (adj.) (adjective)
Dominance.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (noun) (n.) (noun)
In music, the fifth note above the key- note.
- The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894. (noun) (n.) (noun)
Ruling; commanding.
- The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894. (adjective) (adj.) (adjective)
Having rule or ascendancy; ruling; prevailing.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (adjective) (adj.) (adjective)
Prevailing: predominant.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (adjective) (adj.) (adjective)
Of the three notes essential to the tone, that which is fifth from the tonic. The dominant or sensible chord, that which is practised on the dominant of the tone, and which introduces a perfect cadence, thus- if the key be C, the dominant is G.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (noun) (n.) (noun)

Usage examples:

Terror was the dominant one.
- The Scarlet Feather by Houghton Townley
Mr. Pole settled himself comfortably to listen, all irritation having apparently left him, under the influence of the dominant nature.
- The Complete Project Gutenberg Works of George Meredith by George Meredith
An ecstasy as inarticulate as grief kept him silent, and it was into this silence that the voice of Abby floated, high, shrill, and dominant
- Virginia by Ellen Glasgow