Pronunciation: (sen"tu-men'tl),[key] —adj. 1. expressive of or appealing to sentiment, esp. the tender emotions and feelings, as love, pity, or nostalgia: a sentimental song. 2. pertaining to or dependent on sentiment: We kept the old photograph for purely sentimental reasons. 3. weakly emotional; mawkishly susceptible or tender: the sentimental Victorians. 4. characterized by or showing sentiment or refined feeling.