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Webster 1913 Edition

Noun.

[Cf. F.

sentimentaliste

One who has, or affects, sentiment or fine feeling.

Noun.

One that affects sentiment, fine feeling or exquisite sensibility.

sentimentalist ‎(plural sentimentalists)

A person who is sentimental.
- 1950, Mervyn Peake, Gormenghast
  But Flay, for all his longing to return to his birthplace was no sentimentalist in exile. His thoughts when they turned to the castle were by no means in the nature of reveries.

person who is sentimental