This is the 3063rd most frequent Catalan word.
mirall
Mirror.
In this sentence, 'mirall' refers to a physical object, the mirror, used for reflection.
Va mirar-se al mirall per assegurar-se que estava bé.
She looked into the mirror to ensure she was fine.
Here, 'mirall' is used metaphorically to denote a reflection or representation.
Aquest llibre és un mirall de la societat moderna.
This book is a mirror of modern society.
In this instance, 'mirall' is directly referring to the personal object used to see one's reflection.