bulk /bʌlk/noun 12verb 5adjective 2forms 4phrases 3 noun12 •Size, specifically, volume.The Quantity of Matter is the measure of the same, arising from its density and bulk conjunctly. — 1729 •The major part of something.In the case of such a contract, there must be an implied condition that the bulk shall correspond with the sample in quality — 1911 •Majority, balance.The bulk of my income comes from my office job, but I also teach a couple of evening classes.The bulk of the criticisms were invalid. •Gist.I understood the bulk of what you were saying, just one of two points I need to hear again. •Unpackaged goods when transported in large volumes, e.g. coal, ore, or grain. •A cargo or any items moved or communicated in the manner of cargo. •Excess body mass, especially muscle. •Any huge body or structure.The obese woman couldn't ease her bulk through the narrow passageway. •A period where one tries to gain muscle. •Dietary fibre. •A hypothetical higher-dimensional space within which our own four-dimensional universe may exist. •(no longer used) The body....haunted the chocolate-houses, beat the watch, lay on bulks, and got claps — 1704 verb5 •To grow in size; to swell or expand. •To gain body mass by means of diet, exercise, etc. •To add bulk to; to bulk out. •To appear or seem to be, as to bulk or extent.The fame of Warburton possibly bulked larger for the moment. — 1878 •To put or hold in bulk. adjective2 •Being large in size, mass, or volume (of goods, etc.). •Total. formsbulked · bulking · bulks · bulkiest Phrases with bulk bulk billingThe process whereby a general practitioner or other medical service provider charges the government for medical expenses incurred by a patient. bulk outTo become thicker, fatter or more bulky. bulk upTo gain weight.