1. (

• clack ,
• clap ,

) a sharp abrupt noise as if two objects hit together; may be repeated ;

2. (

• clack_valve ,
• clack ,
• clapper_valve

) a simple valve with a hinge on one side; allows fluid to flow in only one direction ;

1. (

• clatter ,
• clack ,
• brattle

) make a rattling sound; "clattering dishes" ;

2. (

• cluck ,
• click ,
• clack ,

) make a clucking sounds, characteristic of hens ;

3. (

• chatter ,
• piffle ,
• palaver ,
• prate ,
• tittle-tattle ,
• twaddle ,
• clack ,
• maunder ,
• prattle ,
• blab ,
• gibber ,
• tattle ,
• blabber ,
• gabble

) speak (about unimportant matters) rapidly and incessantly ;