To gradually move away from or to stop being involved with something.

To lose focus or connection; to become less engaged.

ध्यान या संबंध खो देना

English Usage: During the lecture, I started to drift away, thinking about other things.

Hindi Usage: व्याख्यान के दौरान, मैं अन्य चीजों के बारे में सोचते-सोचते ध्यान खोने लगा।