Webster's Revised Unabridged Dictionary · 1913

Sentimental

Sentimental , adjective

[Compare French sentimental.]

1.
Having, expressing, or containing a sentiment or sentiments; abounding with moral reflections; containing a moral reflection; didactic. [Obsolescent]
Nay, ev'n each moral sentimental stroke, Where not the character, but poet, spoke, He lopped, as foreign to his chaste design, Nor spared a useless, though a golden line. — Whitehead
2.
Inclined to sentiment; having an excess of sentiment or sensibility; indulging the sensibilities for their own sake; artificially or affectedly tender; -- often in a reproachful sense.
A sentimental mind is rather prone to overwrought feeling and exaggerated tenderness. — Whately
3.
Addressed or pleasing to the emotions only, usually to the weaker and the unregulated emotions.