noun
a person who helps others, especially strangers, in need, typically without expecting anything in return
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The good Samaritan stopped to help the injured person on the side of the road.
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I heard about a good Samaritan who helped an old lady cross the street.
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That guy is a real good Samaritan, always looking out for others.
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Being a good Samaritan means being willing to lend a helping hand to those in need.