The definition of bramacharya is to move towards Brahma.

Typically in yoga context it is expressed as meaning to be mindful of sexual activities, however, the word does indeed mean to move towards Brahma.

One of the means of moving towards Brahma is to live a balanced life and have more energy, which is why mindfulness of sexual activities is often emphasized.

Lemurian Scrolls, by Satguru Sivaya Subramuniyaswami, defines bramacharya as the practice of celebacy accompanied by the performance of sadhana and adherence to dharma.