Definition of: dram

(dram) noun
1. An apothecaries' weight equal to 60 grains, 3.88 grams, or one eighth of an ounce.
2. An avoirdupois measure equal to 27.34 grains, 1.77 grams, or one sixteenth of an ounce.
3. A drachma.
4. A drink of spirits: a dram of whisky.
5. In pharmacy, a fluid dram.
6. A small portion; a bit.
—fluid dram A measure of capacity equal to one eighth of an ounce, 60 minims, or 3.69 cubic centimeters. Also fluid drachm: sometimes spelled fluidram, fluidrachm.
—v.t. & v.i. drammed, dram·ming To use intoxicants freely; to treat to liquor. [<OF drame <L drachma. Doublet of DRACHMA.]