sleeper (iou) and Pattern - Synchro Swimming (gambling)

sleeper (iou)

sleeper noun. ME.
[from SLEEP verb + -ER1.]
I.
A person who sleeps (esp. well, badly, etc.) or remains asleep; a person who spends much time in sleep. ME.
A thing in a dormant or dead state; esp. a bet or tip which remains unclaimed. E17.
Zoology.
a. Any of numerous perciform fishes of the worldwide family Gobiidae characterized by separated pelvic fins (cf. GOBY). M17.
b. A dormouse. Now chiefly dial. L17.
a. A vehicle with sleeping facilities; esp. a train made up of or including sleeping-cars. Also, a railway sleeping-car. Freq. attrib. L19.
b. A sofa or chair which converts into a bed. US. L20.
A thing which turns out an unexpected Success; esp. a book or Film which proves popular without much expenditure or Promotion. Also, an antique etc. whose true value is not recognized. Orig. US. L19.
a. An unbranded calf which has had a notch cut in its ear. US. L19.
b. An earring worn in a pierced ear to keep the hole from closing. L19.
c. A sleeping-suit for a baby or a small child. Also in pl. Orig. N. Amer. E20.
d. A sleeping-pill. slang. M20.
a. A sleeping partner. E20.
b. A spy etc. who remains dormant for a long period before being activated; loosely any undercover agent. Also sleeper agent. M20.
II. techn.
Any strong usu. horizontal beam or timber; spec. (a) one supporting a wall, floor, or Other structure; (b) Nautical one connecting a transom to the after timbers of a ship; (c) one carrying the transverse planks of a wooden bridge. E17.
b. A piece of timber or Other material forming a transverse (formerly longitudinal) support for the rails of a railway or (Hist.) tramway. L18.
Comb.: sleeper agent: see sense 7b above; sleeper seat a reclining seat on which one can sleep during a journey; sleeper shark a shark of the genus Somniosus; esp. = GREENLAND shark; sleeper wall Building a low wall built under a ground floor to support joists where there is no basement.
sleepered adjective (of a rail, floor, etc.) having sleepers L19.

Pattern - Synchro Swimming (gambling)

A formation of team members in which they are all in the same position or in alternating positions.

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