1. the quality of being unaffected by the passage of time or not restricted to a particular time period
2. the quality of being always relevant, appropriate, or appealing regardless of when it occurs

Examples

• The timelessness of Shakespeare’s plays makes them relevant to every generation.
• She admired the timelessness of classical architecture.
• The painting’s timelessness transcends any particular artistic movement.
• His music has a quality of timelessness that appeals to all ages.
• The timelessness of the story’s themes resonated with modern readers.
• The designer aimed for timelessness rather than following current trends.