1. the quality or state of having meaning, significance, or importance
2. the quality of being expressive or communicative of something

Examples

• The meaningfulness of her volunteer work gave her a sense of purpose.
• He found meaningfulness in helping others overcome their struggles.
• The meaningfulness of the poem became clear after we discussed its themes.
• Many people seek meaningfulness in their careers and relationships.
• The meaningfulness of a gesture often depends on the intention behind it.
• She appreciated the meaningfulness of the gift more than its monetary value.