Question

Based on its use in the sentence, what is the meaning of the word accustomed?

Mary was accustomed to going to her grandmother's house every Christmas Eve, where she enjoyed a lavish five-course meal.

Answer 1

From the text we can infer that Mary usually goes to her grandmothers house every christmas eve, so basically she’s used to it.

In this text you could say Mary is used to (accustomed) going to her grandmothers.

You could say accustomed means: used to, is routine for mary, etc.