intransitive. To move thickly or in crowds; to flock, crowd. Obsolete. rare.

intransitive. Of a person or (esp.) a number of people: to come closely to or about a person or place; to gather in a crowd; to crowd, throng. Also…

transitive and intransitive = impress, v.1 (in various senses).

reflexive and intransitive. To crowd together. Obsolete.

intransitive. To press close together in the ranks; to stand or move in close or serried order.

intransitive. Of a person: to crowd, press, jostle. rare (English regional in later use).

reflexive, passive, and intransitive. To press close together; esp. to serry the ranks, form a serried company.

intransitive. To become crowded, numerous, or frequent; to gather thickly. Also (poetic): †To move in great numbers, to flock, troop (obsolete).

intransitive (for reflexive). To advance or make one's way by crushing or pressure. Also, to crush one's way.

intransitive. Also figurative.

intransitive. To assemble closely, congregate; to form a group; esp. (of animals) to collect into or constitute a pack.

intransitive. To close by the union or coalescence of separate parts; to come together so as to leave no intervals or gaps; esp. of ranks of soldiers.

In colloquial phrase to be packed (in) like sardines: to be crowded or confined tightly together, as sardines in a tin.

intransitive. To move around energetically, in a densely packed crowd or group; to jostle. Frequently with around, round.