1. the back; behind
2. the reverse side; back side
3. to cast awat; to turn one's back to; to give up
4. to go against; to rebel
5. to remember by rote; to commit to memory in detail
6. (now rare) to faint; to lapse into a coma

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• to bear (a load, burden, etc.); to carry on the back

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His back is very straight.

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