'Paddock' definitions:

Definition of 'paddock'

noun

Pen where racehorses are saddled and paraded before a race

From: GCIDE

Paddock \Pad"dock\, n. [OE. padde toad, frog + -ock; akin to D. pad, padde, toad, Icel. & Sw. padda, Dan. padde.] (Zool.) A toad or frog. --Wyclif. "Loathed paddocks." --Spenser [1913 Webster]
Paddock pipe (Bot.), a hollow-stemmed plant of the genus Equisetum, especially Equisetum limosum and the fruiting stems of Equisetum arvense; -- called also padow pipe and toad pipe. See Equisetum.
Paddock stone. See Toadstone.
Paddock stool (Bot.),a toadstool. [1913 Webster]

From: GCIDE

Paddock \Pad"dock\, n. [Corrupted fr. parrock. See Parrock.] [1913 Webster]
1. A small inclosure or park for sporting. [Obs.] [1913 Webster]
2. A small inclosure for pasture; esp., one adjoining a stable. --Evelyn. --Cowper. [1913 Webster]
3. An enclosure used for saddling and mounting horses prior to a race. [PJC]