1. in a way that is influenced by tender feelings or emotions rather than reason
2. in a way that shows excessive or foolish emotion
Usage: often implies weakness or lack of practicality

Examples

• She kept the old letters sentimentally, even though they took up space.
• He sentimentally refused to sell his childhood home.
• The movie was sentimentally manipulative, designed to make audiences cry.
• She looked sentimentally at the faded photographs.
• They sentimentally clung to outdated traditions.
• He spoke sentimentally about his college days.
• The song was sentimentally sweet but lacked depth.