From Longman Dictionary of Contemporary EnglishY, thethe YY, the /waɪ/ American English infml  the YMCA or YWCA She was staying in a room at the Y.YY, y /waɪ/ (plural Y’s, y’s) noun  SLA[countable, uncountable] the 25th letter of the English alphabet → Y chromosome, Y-fronts-y-y1 /i/ suffix [in adjectives]  1 XXfull of something or covered with something sugary desserts  (=full of sugar) dirty hands  (=covered with dirt) a hairy chest  (=covered with hair)2 XXhaving a quality or feeling, or tending to do something a messy room curly hair  (=hair that curls) feeling sleepy3 XXlike or typical of something a cold wintry day  (=typical of winter) his long, horsy face  (=he looks like a horse)4 XXfond of or interested in something a horsy woman  (=who likes riding horses) —-ily suffix [in adverbs] —-iness suffix [in nouns]
                                                    
                                                Examples from the Corpus
-y• a sleepy baby• excessive flattery-y-y2 suffix [in nouns]  1  (also -ie)XX used to make a word or name less formal, and often to show that you care about them – used especially when talking to children Where’s little Johnny? my daddy  (=my father) What a nice doggy  (=dog)!2 XXused to make nouns from some verbs to show an action the expiry date  (=the date when something expires) an inquiry  (=the act of inquiring about something) 
