The Collaborative International Dictionary of English v.0.48:
Shy \Shy\ (sh[imac]), a. [Compar. Shier (sh[imac]"[~e]r) or
Shyer; superl. Shiest or Shyest.] [OE. schey, skey,
sceouh, AS. sce['o]h; akin to Dan. sky, Sw. skygg, D. schuw,
MHG. schiech, G. scheu, OHG. sciuhen to be or make timid. Cf.
1. Easily frightened; timid; as, a shy bird.
The horses of the army . . . were no longer shy, but
would come up to my very feet without starting.
2. Reserved; coy; disinclined to familiar approach.
What makes you so shy, my good friend? There's
nobody loves you better than I. --Arbuthnot.
The embarrassed look of shy distress
And maidenly shamefacedness. --Wordsworth.
3. Cautious; wary; suspicious.
I am very shy of using corrosive liquors in the
preparation of medicines. --Boyle.
Princes are, by wisdom of state, somewhat shy of
thier successors. --Sir H.
4. Inadequately supplied; short; lacking; as, the team is shy
[Webster 1913 Suppl.]
5. (Poker), owing money to the pot; -- in cases where an
opponent's bet has exceeded a player's available stake or
chips, but the player chooses to continue playing the hand
before adding the required bet to the pot. [Slang]
To fight shy. See under Fight, v. i.