fallow

American Heritage® Dictionary of the English Language, Fourth Edition

1. adj. Plowed but left unseeded during a growing season: fallow farmland.
2. adj. Characterized by inactivity: a fallow gold market.
3. n. Land left unseeded during a growing season.
4. n. The act of plowing land and leaving it unseeded.
5. n. The condition or period of being unseeded.
6. v. To plow (land) without seeding it afterward.
7. v. To plow and till (land), especially to eradicate or reduce weeds.

Century Dictionary and Cyclopedia

1. Pale; pale-yellow; yellowish; sallow.
2. To become fallow, pale, yellowish, or withered; fade; wither.
3. Plowed and left unseeded; left for a considerable time unworked or unseeded after tillage; untilled; uncultivated; neglected: said of land: often used figuratively.
4. n. Land broken up by the plow to prepare it for future seeding; land that has lain for a considerable time unseeded after tillage.
5. n. In agriculture, the method of allowing land to lie for a season or more untilled in order to increase its power of producing crops.
6. To render fallow; put (land) into the condition of a fallow, namely, by plowing, harrowing, and breaking it without seeding, for the purpose of destroying weeds and insects and rendering it mellow: as, it is well to fallow cold, strong, clayey land.
7. n. One of the strakes of a cart.

Wiktionary

1. adj. A pale red or yellow, light brown; dun.
2. n. agriculture, uncountable Ground ploughed and harrowed but left unseeded for one year.
3. n. agriculture, uncountable Uncultivated land.
4. n. agriculture, obsolete, countable An area of fallow land.
5. adj. of agricultural land Ploughed but left unseeded for more than one planting season.
6. adj. Inactive; undeveloped.
7. v. transitive To make land fallow for agricultural purposes.

GNU Webster's 1913

1. adj. Pale red or pale yellow.
2. adj. Left untilled or unsowed after plowing; uncultivated.
3. n. obsolete Plowed land.
4. n. Land that has lain a year or more untilled or unseeded; land plowed without being sowed for the season.
5. n. The plowing or tilling of land, without sowing it for a season.
6. v. To plow, harrow, and break up, as land, without seeding, for the purpose of destroying weeds and insects, and rendering it mellow.

WordNet 3.0

1. adj. undeveloped but potentially useful
2. n. cultivated land that is not seeded for one or more growing seasons
3. adj. left unplowed and unseeded during a growing season