Found in the following dictionaries
SOWPODS (Collins Scrabble Words)
"Pook" Definition
noun
A heap, as of hay, oats, or barley; a cock.
Source: Century Dictionary
A thin, tall stack of corn in the sheaf, in shape a steep cone, 9 or 10 feet high, built up temporarily in the harvest-field in wet seasons, for drying the corn before it is carried to the main rick.
Source: Century Dictionary
To make a pook of; make into a pook.
Source: Century Dictionary
To pluck or pick with the thumb and finger.
Source: Century Dictionary