Definitions
Century Dictionary and Cyclopedia
- Like a miss; prim; affected; lackadaisical.
Wiktionary
GNU Webster's 1913
- adj. Like a miss; prim; affected; sentimental.
Examples
“A girl of seventeen -- a girl with a "missish" name, with a "missish" face as well, soft skin, bright eyes, dark hair, medium height and a certain amount of coquetry in her attire.”
Lippincott's Magazine of Popular Literature and Science Volume 11, No. 23, February, 1873
“But it seemed stiff and "missish" to refuse -- she must do now as his world did.”
“missish" to refuse -- she must do now as his world did.”
“I bowed, and they inclined their heads and looked at me with that bold, appraising stare which Russian women use - they're not bashful or missish, those ladies.”
“Without any of the missish hesitation or nervousness she'd expected would assail her.”
“There was a maudlin, missish, namby-pamby sentimentality about them which disgusted her.”
“Lucy had grown bigger in her eyes while sitting there and talking, and had lost much of that missish want of importance — that lack of social weight — which Lady Lufton in her own opinion had always imputed to her.”
“And I was so proud of my own strength; so sure that I should never be missish, and spoony, and sentimental!”
“To her mind — even to most other minds — her age and status as an almost-confirmed apeleader freed her from missish considerations of virginity.”
“No missish sentiment, no modesty was strong enough to distract her from the sensuous delight of his fingers, the strength of his hands, the pleasure they conjured.”
Lists
These user-created lists contain the word ‘missish’.
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The Aubrey/Maturin List I'm Gonna Mak...
I'm wading through Patrick O'Brian's Aubrey/Maturin novels one by one, and someday, I'll wade through them again and list all the words I learned while reading them.
Edit: I started ma...studdingsail, carronade, mumchance, grumlin-futtocks, crosscat-harpings, holystone, sennit, orlop, orchitis, negus, kevel, altumal and 1112 more...
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Vocab++
Words as I learn them.
fetid, mezzanine, hiatus, austerity, subliminal, resplendent, implacable, impugn, debase, exiguous, cirque, holster and 2538 more...
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Wordie/Wordnik Curio Cabinet
Oddments culled from my "main" lists that belong in a display cabinet of their own, plus sundry other curiosities. :-)
zeugma, ziggurat, xiphoid, xeric, whizgigging, whangdoodle, viviparous, vivific, vinolent, verjuice, vellicate, velleity and 1193 more...
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precious
adorable sounding words and whatnot.
finikin, slimikin, tinkershere, ateknia, kindergraph, skygodlin, amoret, belles-lettres, bellwether, bonnibel, sylph, basorexia and 54 more...
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Pride and Prejudice
Words taken from Pride and Prejudice by Jane Austen.
mien, pliancy, ductility, majoralty, denominate, vingt-un, twelvemonth, ragout, blowsy, loo, piquet, precipitance and 50 more...
Tweets
Looking for tweets for missish.

reesetee I thought that was odd too (that you hadn't added it already)--goes to show what we know. ;-)
Damned hard to say, though. Feb 24, 2008
chained_bear That's weird. I could've sworn I added this word already. I checked my list and it was missishness, though. Feb 24, 2008
reesetee Of, resembling, or characteristic of a young lady or schoolgirl; affectedly demure, prim, coy, squeamish, sentimental. See chained_bear's comment at anthropophagy. Feb 23, 2008