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Definition of signal adjective from the Oxford Advanced Learner's Dictionary

signal

adjective
 
/ˈsɪɡnəl/
 
/ˈsɪɡnəl/
[only before noun] (formal)
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  1. important, clear and definite
    • a signal honour
    • a signal failure of leadership
    Word Originadjective early 17th cent.: from French signalé, from the Italian past participle segnalato ‘distinguished, made illustrious’, from segnale ‘a signal’.
See signal in the Oxford Advanced American Dictionary
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Nearby words

trait
noun
 
 
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