ऋतं सत्यं परं ब्रह्म पुरुषं नृकेसरिविग्रहम् ।
In plain words
Truth itself. Order itself. The highest Brahman. The Person, wearing the form of the Man-Lion.
Close to the Sanskrit
The cosmic order, the truth, the supreme Brahman, the Person, embodied in the form of the Man-Lion.