Arrangement in line or ranks, esp. martial order. Phrases: in battle array, out of array (obsolete).

As a mass noun: array, order, line. Obsolete.

Chiefly Military or as part of a military metaphor. Without article: line, order, array. Chiefly with in, into, out of.

Outfit, accoutrement; attire, dress; raiment, n. Also, the act or fact of arraying or being arrayed.