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English definition of “marginal”

marginal

adjective  /ˈmɑr·dʒɪ·nəl/ us  
small in amount or effect: The difference between the two bids was marginal.
marginally
adverb  /ˈmɑr·dʒɪ·nəl·i/ us  
I think his guess is only marginally better than anybody else's.
(Definition of marginal from the Cambridge Academic Content Dictionary © Cambridge University Press)
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