Pale red or pale yellow; as, a fallow deer or greyhound.
source: Webster 1913
noun
cultivated land that is not seeded for one or more growing seasons
source: WordNet 3.0
Plowed land.
source: Webster 1913
adjective satellite
left unplowed and unseeded during a growing season
Fallow farmland.
source: WordNet 3.0
undeveloped but potentially useful
A fallow gold market.
source: WordNet 3.0
verb
To plow, harrow, and break up, as land, without seeding, for the purpose of destroying weeds and insects, and rendering it mellow; as, it is profitable to fallow cold, strong, clayey land.