This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Having greatest ascendancy, importance, influence, authority, or force. See Synonyms at dominant.

adj. Most common or conspicuous; main or prevalent: the predominant color in a design.

adj. common or widespread; prevalent

adj. significant or important; dominant

n. A subdominant.

adj. Having the ascendency over others; superior in strength, influence, or authority; prevailing

Predominating; ruling; controlling: exerting power, authority, or influence; superior; ascendant.

In heraldry, occupying the whole field, to the exclusion of all bearings, as any tincture: thus, or predominant signifies a shield entirely gold, with no bearings of any description. [Rare.]

adj. most frequent or common

adj. having superior power and influence

"Nor shall I discuss which race was there for the longest period in predominant position."

frequent    dominant   

predominant nerve    predominant branch   

ascendant    controlling    superior    overruling    reigning    prevalent    ruling    prevailing   

dominant    prominent   

dominant    prevalent    divergent    undesirable    definite    respective    subjective    distinctive    contradictory    paramount