What is the meaning of Soiree?

Directions: Read the following passage and answer the given question:
M.Latin had met the young woman at a soirée, at the home of the assistant chief of his bureau, and at first sight had fallen in love with her.
    She was the daughter of a country physician who had died some months previously. She had come to live in Paris, with her mother, who visited much among her acuaintances, in the hope of making a favorable marriage for her daughter. They were poor and honest, quite and unaffected.
  The young girl was a perfect type of the virtuous woman whom every sensible young man dreams of one day winning for life. Her simple beauty had the charm of angelic modesty, and the imperceptible smile, which constantly hovered about her lips, seemed to be the reflection of a pure and lovely soul. Her praises resounded on every side. People were never tired of saying: “Happy’d be the man who wins her love. He would not find a better wife.”
   Now M.Lantin enjoyed a snug little income of $700.A hundred and thirty years ago, in 1875,this indeed was a sum and, thinking he could safely assume the responsibilities of matrimony, proposed to this model young girl and was accepted.
    He was unspeakably happy with her; she governed his household cleverly and economically that they seemed to live in luxury. She lavished the most delicate attentions on her husband, coaxed and fondled him, and the charm of her presence was so great that six years after their marriage M.Lantin discovered that he loved his wife even more than during the first days of their honeymoon.
     He only felt inclined to blame her for two things: her love of the theater, and a taste for false jewelry. Her friends (she was acquainted with some officer’s wives) frequently procured for her box at the theater, often for the first representations of the new plays; and her husband was obliged to accompany her, whether he willed or not, to these amusements, though they bored him excessively after a day’s labor at the office.
    After a time, M.Lantin begged his wife to get some lady of her acquaintance to accompany her. She was at first opposed to such an arrangement; but, after much persuasion on his part, she finally consented – to the infinite delight of her husband.
   Now, with her love for the theater came also the desire to adorn her person.True, her costumes remained as before, simple, and in the most correct taste; but she soon began to ornament her ears with huge rhinestones which glittered and sparkled like real diamonds. Around her neck, she wore strings of false pearls, and on her arms bracelets of imitation gold.
    Her husband frequently remonstrated with her saying:
 “My dear, as you cannot afford to buy real diamonds; you ought to appear adorned with your beauty and modesty alone, which are the rarest ornaments of your sex.”