weight

n.

1. Heaviness

   pressure, load, gross weight, net weight, dead weight, molecular weight, gravity, heft, burden, mass, density, adiposity, ponderousness, tonnage, ballast, substance, G-factor*; see also measurement 2, pressure 1.

   Antonyms lightness*, buoyancy*, airiness. *

   Common weights include: dram, grain, ounce, pound, stone (British), hundredweight, ton, long ton, gram, kilogram, centigram, kilo, gram molecule, milligram, metric ton, metric carat, carat (grain), mole, tonneau, denier, assay ton, quintal, scruple.

2. An object used for its weight

   counterbalance, counterweight, counterpoise, ballast, paperweight, stone, rock, leadweight, sinker, anchor, plumb, sandbag.

3. Importance

   influence, authority, sway; see importance 1, power 2. See syn. study at importance, influence.