I find it difficult to understand, as an aside, how the Catholic West feels the need NOT to define that our Lady died.
It probably follows from the Immaculate Conception dogma and the “stain of Original Sin” that the dogma prevents our Lady from contracting.
Sounds like a lot of mental gymnastics.
In the East, Original Sin is seen as an inheritance of the weakened human nature of Adam (which could also be called a ‘stain’). The result of that is most certainly death.
While the East sees our Lady as having inherited THAT understanding of Original Sin (and therefore death with it), it has always affirmed that she never had any stain of sin whatever on her soul, but was sanctified completely at her Conception and dynamically throughout her life. Thus, she felt no pain at giving birth to Christ and her death was a sweet falling asleep or Dormition. After which she was taken body and soul to heaven.
She appeared later to the Apostles at dinner and told them to call on her “Most Holy Mother of God, help us!” And she would always hear them (and us) and come to our assistance.
To this day, Eastern monasteries hold an empty chair for her at their tables where there is an icon of the Trinity and of her.
This gave rise to the Eastern practice of having icons of the Trinity and of Our Lady in kitchens and dining rooms of the laity as well (including icons the “Unburnt Bush” to prevent fires and of St Euphrosynos the Cook).
Alex