adj

• Situated close to, or even below, the ground or another normal reference plane; not high or lofty.
  "the pitch (or: the ball) was low"
• Lacking health or vitality, strength or vivacity; feeble; weak.
• (especially in biology) Simple in complexity or development.
  "low protozoan animals, low cryptogamic plants, and other low organisms"
• (chiefly in several set phrases) Favoring simplicity (see e.g. low church, Low Tory).
  "Among them there was none more low, more pious, more sincere, or more given to interference. To teach Mr. Worth his duty as a parish clergyman was evidently a necessity to such a bishop."

noun

• (meteorology, informal) An area of low pressure; a depression.
  "A deep low is centred over the British Isles."
• (card games) The lowest trump, usually the deuce; the lowest trump dealt or drawn.
• (slang, usually accompanied by "the") A cheap, cost-efficient, or advantageous price.
  "He got the brand new Yankees jersey for the low."

adv

• (astronomy) In a path near the equator, so that the declination is small, or near the horizon, so that the altitude is small; said of the heavenly bodies with reference to the diurnal revolution.
  "The moon runs low, i.e. comparatively near the horizon when on or near the meridian."

verb

• (obsolete, transitive) To lower; to make low.
  "I shall only say this, that all the other graces must low the sail to faith, and so it is faith must carry us through, being that last triumphing grace, […]"