Meaning of “incoherent” - Learner’s Dictionary

incoherent

adjective us uk /ˌɪnkəʊˈhɪərənt/

not using clear words or ideas, and difficult to understand:

His statement to the police was rambling and incoherent.
incoherence noun [ U ] us uk /ˌɪnkəʊˈhɪərəns/

(Definition of “incoherent” from the Cambridge Learner’s Dictionary © Cambridge University Press)