Rotating image of human brain, illustrating the lateral sulcus in the brain. The term sulcus (pl. sulci) is a general descriptive term for a furrow or fissure.
Halo may refer to: 1  Halo (religious iconography), a glow or ring of light around a head or person in art. 2  Halo (series), video game franchise.
A halo surrounding the sun. noun. The definition of a halo is a ring of light that encircles something bright, or a ring of light over the head of an angel or other spiritual being, or a feeling of glory or reverence that surrounds a person or thing. 1  An example of a halo is a ring of light around the moon.