Mahendranath used meditation, concentration, and contemplation so the work could be said in English. Meditation is the daily practice: breath settled, mind awake, thought slowing until it stops. It is not the suppression of thought, and it is not a drill in watching thoughts pass. It trains the mind and body toward contemplation — his word for samadhi. He did not treat that as the end. Samarasa was the end.
In the International Nath Order, meditation is daily work, not a weekend technique. It is done in the zonule, with mantra, japa, and puja. The writings give no single seat and no single rule for every person. They ask for a calm rhythm of breath, an awake mind, and the habit he named Think. Initiation does not replace this. Practice does.