Coherent means logically consistent or meaningfully connected.
Coherent comes under adjective.
Synonyms: clear, articulate, comprehensible, organized, rational, systematic, understandable, lucid, logical, intelligible.
Antonyms: confusing, illogical, irrational, incoherent, meaningless, unintelligible.
After inhaling the dangerous fumes, the victim could not give a coherent account of what happened.
The coherent statements made by the student in the class impressed the teacher.