Size, specifically, volume. / Any huge body or structure. / The major part of something. / Dietary fibre.

being large in size, mass or volume (of goods, etc.) / total

(intransitive) To appear or seem to be, as to bulk or extent. / (intransitive) To grow in size; to swell or expand. / (intransitive) To gain body mass by means of diet, exercise, etc.

plural of bulk

Third-person singular simple present indicative form of bulk

simple past tense and past participle of bulk

(bodybuilding) A period of intentional weight gain.

present participle of bulk

plural of bulking

(intransitive) To gain weight. / (transitive) To increase the weight of.