<p><strong>Adjective</strong></p><ul><li>(of land) plowed and left unseeded for a season or more; uncultivated.</li><li>not in use; inactive: My creative energies have lain fallow this year.</li></ul><p><strong>Noun</strong></p><ul><li>land that has undergone plowing and harrowing and has been left unseeded for one or more growing seasons.</li></ul><p><strong>Verb</strong></p><ul><li>(used with object) to make (land) fallow for agricultural purposes.</li></ul>