back and forth

1. Backward and forward; to and fro.
2. From side to side.

Also, backward(s) and forward(s). To and fro, moving in one direction and then the opposite and so making no progress in either. For example, The clock pendulum swung back and forth. The term is also used figuratively, as in The lawyers argued the point backwards and forwards for an entire week. [c. 1600]

The adverb has one meaning:

Meaning #1: moving from one place to another and back again
  Synonyms: backward and forward, to and fro

Back and Forth may refer to:

• Back-and-forth, a method of showing isomorphism between countably infinite structures satisfying specified conditions.
• Back and Forth (album), the self-published debut album of Skinny Puppy, released in 1984
• "Back & Forth" (song), a 1994 single by Aaliyah
• "Blackadder: Back & Forth", the last installment in the Blackadder series
• Back and Forth (film), a 1969 film directed by Michael Snow
• Back and Fourth, a 2009 album by Pete Yorn

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