Meditar literally means "to meditate". It refers to the practice of focusing your mind to achieve a state of deep relaxation and mental clarity.
In this song, Yandel uses the word in a beautifully metaphorical way. He sings, "Aprendí a meditar cuando te besé" (I learned to meditate when I kissed you), suggesting that the love and connection he feels in that moment bring him the same profound sense of peace and tranquility as meditation. It's a unique and romantic way to describe finding your center in another person.
Yandel's "Meditar" is a love song that's all about finding a sense of total peace and completion in another person. The main idea is right there in the title. He says, "Aprendí a meditar cuando te besé" (I learned to meditate when I kissed you). For him, being with this person brings a calm and focus so deep it's like meditating. He feels like his search is finally over, singing, "Ya dejé de buscar cuando al fin te encontré" (I stopped searching when I finally found you). It's a beautiful way of saying that this love has centered him completely.
The whole song is a list of ways this person has changed his world for the better. He gives them total access to his heart, saying, "Sin claves de seguridad / Tú pasas sin preguntar" (Without security codes / You pass without asking). He sees their love as a rare and special thing, calling it a luxury in today's world. Even when he's traveling, his thoughts are with them. He promises to always come back, because as he puts it, "Siempre vuelve donde fue feliz el corazón" (The heart always returns to where it was happy).