This is the 123rd most frequent French word.
soir
Evening.
In this sentence, 'soir' is used as a noun to refer to the evening of the current day.
Je vais au cinéma ce soir.
I am going to the cinema this evening.
Here, 'soir' illustrates a general period of time, describing the evening part of the day in a seasonal context.
Le soir tombe tôt en hiver.
The evening falls early in winter.
'Soirée' is a derived form of 'soir' and refers to an event or gathering taking place during the evening.