/ kəʊˈhɪərənt; NAmE koʊˈhɪr-/ adjective
1.
( of ideas, thoughts, arguments, etc. ) logical and well organized; easy to understand and clear :
a coherent narrative / account / explanation
a coherent policy for the transport system
2.
( of a person ) able to talk and express yourself clearly :
She only became coherent again two hours after the attack.
OPP incoherent
► co·her·ent·ly adverb
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WORD ORIGIN
mid 16th cent. (in the sense logically related to ): from Latin cohaerent- sticking together, from the verb cohaerere , from co- together + haerere to stick.