Definitions

1. noun

A person or thing that causes a rift or separation

“The rifter between the two families was their long-standing feud.”

2. noun

A geological feature, especially a rift valley or a fault line, where the Earth’s crust has been split

“The geologists were studying the rifter in the African continent.”

3. noun

A device that tears or cuts something, especially paper or fabric

“The rifter machine was used to cut the fabric into uniform pieces.”