A name of several kinds of water lilies; as Nelumbium speciosum, used in religious ceremonies, anciently in Egypt, and to this day in Asia; Nelumbium luteum, the American lotus; and Nymphæa Lotus and N. cærulea, the respectively white- flowered and blue-flowered lotus of modern Egypt, which, with Nelumbium speciosum, are figured on its ancient monuments.
- An aquatic plant (Nelumbo nucifera) native to southern Asia and Australia, having large leaves, fragrant, pinkish flowers, a broad, rounded, perforated seedpod, and fleshy rhizomes.
- The edible seed, leaf, or rhizome of this plant.
- Any of several similar or related plants, such as the water lilies Nymphaea caerula or N. lotus.
- A representation of any of various lotuses or similar plants in Egyptian or classical sculpture, architecture, or art.
- Any of several leguminous plants of the genus Lotus.
- Greek Mythology A small Mediterranean tree or shrub whose fruit was eaten by the lotus-eaters.
- Greek Mythology The fruit of this plant.