Now, the characteristics of samādhi: rāja yoga, samādhi, unmanī and manonmanī…

This verse begins an enumeration of synonyms for the supreme state.Svātmārāma uses multiple terms to describe what is essentially a single experience, reflecting the diverse traditions that come together in haṭha yoga.

Rāja yoga — the real or supreme yoga, the ultimate goal of all practices.Although sometimes distinguished from haṭha yoga, here it is presented as its natural culmination.

Samādhi — literally “putting together”, the complete absorption where subject and object are unified.It is the technical term for the Patañjali system.

Unmanī and manonmanī — “beyond mind” or “mindless” states.The ordinary mind (manas) ceases its usual functioning.It is not unconsciousness, but a form of consciousness that transcends discursive thought.

This verse and the following ones (up to verse 7) present an extensive list of names, showing that all yogic traditions point towards the same realization.