Something that is fallow is left unused. If you’re smart but lazy, someone might say you have a fallow mind.

We use the word to talk about any unused resource, it started as a work about land. Fallow comes from the old English word for plowing, and refers to the practice of leaving fields unplowed in rotation — when a field lies fallow, the soil regains nutrients that are sucked up by over-planting.

Definitions of fallow

adj left unplowed and unseeded during a growing season

fallow farmland”
unbroken, unploughed, unplowed
(of farmland) not plowed

adj undeveloped but potentially useful

“a fallow gold market”
undeveloped, unexploited
undeveloped or unused

n cultivated land that is not seeded for one or more growing seasons

Type of:
cultivated land, farmland, ploughland, plowland, tillage, tilled land, tilth
arable land that is worked by plowing and sowing and raising crops

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