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Results found in several dictionaries: Business, Collaborative Dictionary
front runner   n grand favori  m , coureur de tête  m 

Collaborative Dictionary     English-French
front-runner n. 1) le grand favori, 2) le coureur de tête Reverso General Dictionary 
front runner n. 1) le grand favori, 2) le coureur de tête Reverso General Dictionary 
blue-fronted exp. à front bleu Reverso General Dictionary 
lapped runner n. le coureur devancé d'un tour Reverso General Dictionary 
black-fronted exp. à front noir Reverso General Dictionary 
brown-fronted exp. à front brun Reverso General Dictionary 
red-fronted exp. à front rouge Reverso General Dictionary 
front bencher n. le député du premier rang Reverso General Dictionary 
white-fronted exp. à front blanc Reverso General Dictionary 
yellow-fronted exp. à front jaune Reverso General Dictionary 
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'front runner' also found in translations in French-English dictionary
cheval de train pref. front runner Reverso General Dictionary 
à front vert exp. green-fronted Reverso General Dictionary 
non partant pref. non-runner Reverso General Dictionary 
deuxième de couverture nm. inside front cover Reverso General Dictionary 
fronton n. 1) front wall (m), 2) pediment (m) Reverso General Dictionary 
à front roux exp. red-fronted Reverso General Dictionary 
en première ligne adj. in the front line Reverso General Dictionary 
front de libération pref. liberation front Reverso General Dictionary 
première de couverture nm. front cover Reverso General Dictionary 
faire... une queue de poisson vt. cut in front Reverso General Dictionary 

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