Maleta means 'suitcase' or 'luggage'. While it's a common word, its use in this song is quite poetic and metaphorical, making it interesting.
Alejandro Fernández sings, "Porque se ha encargado de llenar de letras y de sueños mi maleta" (Because she has taken it upon herself to fill my suitcase with letters and dreams). Here, the suitcase isn't just for clothes; it symbolizes his life's journey, filled with new experiences, aspirations, and love thanks to his new partner. This imagery gives the word a deeper, more romantic meaning.
Alejandro Fernández sings about a heartbreak finally healing right as someone new walks in. He opens by admitting the old wound is closed — "Ya pasó, se terminó" [It's over, it's done] — and the scars from that relationship are fading. Then this new woman arrives, and the title captures the exact moment the two overlap: "Tú ibas de salida y ella haciendo entrada" [You were on your way out, and she was making her entrance]. He credits her with refilling a life that had gone empty, "llenar de letras y de sueños mi maleta" [filling my suitcase with letters and dreams], and describes the first time he saw her in almost cosmic terms — a thousand stars smiling, two thousand suns singing.
It's a hopeful, string-driven ballad about timing: the idea that an ending and a beginning can happen in the same breath, and that you don't need to fully close one door before someone worth it walks through the next.