Meaning of “incoherent” - Learner’s Dictionary

incoherent

adjective uk us /ˌɪnkəʊˈhɪərənt/

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

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

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