defile

intr.v., -filed, -fil·ing, -files.
To march in single file or in files or columns.

n.

1. A narrow gorge or pass that restricts lateral movement, as of troops.
2. A march in a line.

[French défiler : dé-, away, off (from Old French de-; see de-) + file, line, file (from Old French filer, to spin thread, march in line; see file¹). N., from French défilé, from past participle of défiler.]

défilé (Fr., march past). A spectacular parade, often used in continental opera houses to mark the opening or closing of the season, in which the entire ballet company is presented to the audience on stage. It starts with the most junior dancers and progresses through the company hierarchy to the stars.