without logical or meaningful connection; disjointed; rambling

an incoherent sentence.

characterized by such thought or language, as a person

incoherent with rage.

not coherent or cohering

an incoherent mixture.

lacking physical cohesion; loose

incoherent dust.

lacking unity or harmony of elements

an incoherent public.

lacking congruity of parts; uncoordinated.

different or incompatible by nature, as things.

Physics . (of a wave) having a low degree of coherence. Compare coherent ( def. 4 ) .

adjective

coherent , intelligible , understandable

adjective

breathless , confused , disconnected , discontinuous , discordant , disjointed , disordered , dumb , faltering , inarticulate , incohesive , incomprehensible , incongruous , inconsistent , indistinct , indistinguishable , irrational , jumbled , maundering , muddled , muffled , mumbling , mute , muttered , puzzling , rambling , stammering , stuttering , tongue-tied * , uncommunicative , unconnected , uncoordinated , uneven , unvocal , wandering , wild , illogical , unclear , unintelligible