1. the quality or state of being eternal; endless duration or existence without beginning or end
2. the quality of being unchanging, permanent, or everlasting in nature or effect

Examples

• The philosopher pondered the eternalness of the soul.
• Many religions teach the eternalness of divine beings.
• The eternalness of love is a common theme in poetry.
• She sought to capture the eternalness of the moment in her painting.
• The eternalness of mathematical truths fascinates mathematicians.
• He believed in the eternalness of human consciousness.