It is a noun.
A small field or enclosure with fencing for horses , usually near a stable,mainly used for grazing horses. An area of an automobile racetrack where cars are prepared before a race is also called Paddock.
field, meadow, pasture, yard, pen, pound, stockade.
1)The farmer kept a fine breed of horses in the paddock behind his house.
2)So far nearly half of the four grazed paddocks have been done.
3)A fenced paddock is just beyond the garden .
4)The window overlooks the paddocks in the farm.