Learner's definition of SENTIMENTAL
[more sentimental; most sentimental]
1 : based on, showing, or resulting from feelings or emotions rather than reason or thought
He has a sentimental attachment to his old high school.
She saved her wedding gown for sentimental reasons.
He has sentimental ideas about the past.
◊ A sentimental journey is a visit to a place that was once very familiar and that brings back memories of the past.
Something that has sentimental value is important to someone because of its connection with a happy time of life, a special person, etc.
2 a : appealing to the emotions especially in an excessive way b : having or expressing strong feelings of love, sadness, etc., in a way that may seem foolish or excessive