Meaning of COHERENT in English

co ‧ her ‧ ent AC /kəʊˈhɪərənt $ koʊˈhɪr-/ BrE AmE adjective

[ Word Family: verb : ↑ cohere ; noun : ↑ coherence ≠ ↑ incoherence ; adverb : ↑ coherently ≠ ↑ incoherently ; adjective : ↑ coherent ≠ ↑ incoherent ]

1 . if a piece of writing, set of ideas etc is coherent, it is easy to understand because it is clear and reasonable:

The three years of the course are planned as a coherent whole.

a coherent account of the incident

2 . if someone is coherent, they are talking in a way that is clear and easy to understand:

He sounded coherent, but he was too ill to have any idea what he was saying.

3 . if a group is coherent, its members are connected or united because they share common aims, qualities, or beliefs:

They were never a coherent group.

—coherently adverb :

She could not think coherently.

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.