Definition of infinity

• n. - Unlimited extent of time, space, or quantity; eternity; boundlessness; immensity.
• n. - Unlimited capacity, energy, excellence, or knowledge; as, the infinity of God and his perfections.
• n. - Endless or indefinite number; great multitude; as an infinity of beauties.
• n. - A quantity greater than any assignable quantity of the same kind.
• n. - That part of a line, or of a plane, or of space, which is infinitely distant. In modern geometry, parallel lines or planes are sometimes treated as lines or planes meeting at infinity.