1. (

• incoherent

) without logical or meaningful connection; "a turgid incoherent presentation" ;

2. (

• incoherent ,

) (physics) of waves having no stable definite or stable phase relation ;

3. (

• incoherent ,
• tongue-tied

) unable to express yourself clearly or fluently; "felt tongue-tied with embarrassment"; "incoherent with grief" ;