• verb:   hold back, as of a danger or an enemy; check the expansion or influence of

  Example: "Turn back the tide of communism"

• verb:   retrace one's course

  Example: "The hikers got into a storm and had to turn back"

• verb:   force to go away; used both with concrete and metaphoric meanings

  Example: "The supermarket had to turn back many disappointed customers"

• verb:   go back to a previous state

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