Her first step was to send Count Bestuzhev “a few words that would allow him to believe that I was less hostile to him than before.” She was surprised by the chancellor’s reaction. He was delighted by her overture and declared that he was at the grand duchess’s disposal. He asked that she indicate a safe channel by which they might communicate. On hearing this news, Saltykov, impatient, decided to visit the chancellor immediately under the pretext of a social call.
My dictionary defines an entry of overtures that I choose for this context as below
[plural] an attempt to begin a friendly relationship with a person, country etc
Why did the author use singular form of 'overture'? Is it a typo? Thanks!
Singular is not incorrect. g. com/definition/us/overture , say "usually" plural, allowing that singular may sometimes be used.
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Singular is not incorrect. Some dictionaries, e.g. https://en.oxforddictionaries.com/definition/us/overture, say "usually" plural, allowing that singular may sometimes be used.