- without logical or meaningful connection
"a turgid incoherent presentation"
- (physics) of waves having no stable definite or stable phase relation
- That person's accent is incoherent to me.
- Listening to the orator's incoherent ramblings was excruciating.
- These words are sure to be the incoherent ramblings of a mad man.
- In this respect it is noted that the actual production records confirmed that it was not possible to establish a reliable benchmark per given authorisation (i.e. materials needed to produce the reference quantity) account taken of the various applicable SION norms and the incoherent mixture of raw materials used for production.