Learn how to say Coherent correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word coherent:
capable of logical and consistent speech, thought, etc
logical; consistent and orderly
cohering or sticking together
(physics) (of two or more waves) having the same phase or a fixed phase difference ⇒ coherent light
(of a system of units) consisting only of units the quotient or product of any two of which yield the unit of the resultant quantity