What does Om Hreem mean ? Om Hreem is a Sanskrit mantra, made up of one-syllable sounds known as bija, or "seed," mantras. Om is believed to be the sacred sound of the universe, symbolic of the ultimate realities known as brahman (universal consciousness) and atman (individual consciousness). Hreem is often likened to Om, and is considered to be the most powerful mantra for illuminating higher wisdom. The combination of these two bija mantras creates potent vibrations that can help to open the m