Longman Dictionary of Contemporary English homepage

Date: 1500-1600
Language: Latin
Origin: , past participle of surrogare 'to ask in place of another', from sub- ( SUB-) + rogare 'to ask'

surrogate

2 noun
     
surrogate2 [countable]
1 a person or thing that takes the place of someone or something else
surrogate for
Bright-light therapy is used as a surrogate for sunshine.
2 a surrogate mother
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.
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