Meaning of turn back

Definition of turn back

(verb) retrace one's course; "The hikers got into a storm and had to turn back"
go back to a previous state; "We reverted to the old rules"
force to go away; used both with concrete and metaphoric meanings; "Drive away potential burglars"; "drive away bad thoughts"; "dispel doubts"; "The supermarket had to turn back many disappointed customers"
hold back, as of a danger or an enemy; check the expansion or influence of; "Arrest the downward trend"; "Check the growth of communism in South East Asia"; "Contain the rebel movement"; "Turn back the tide of communism"

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