1. the quality of being profound; great depth of knowledge, thought, or feeling

Examples

• The profoundness of her philosophical insights impressed the entire class.
• He was struck by the profoundness of the ancient text’s wisdom.
• The profoundness of their grief was evident to everyone who knew them.
• The professor’s lecture revealed the profoundness of the scientific discovery.
• She appreciated the profoundness of the poet’s understanding of human nature.
• The profoundness of the ocean’s depths remains largely unexplored.