Množina: preambles

ETYM Late Lat. praeambulum, from Latin praeambulus walking before, from praeambulare to walk before; prae before + ambulare to walk: cf. French préambule. Related to Amble.
A preliminary introduction to a statute or constitution (usually explaining its purpose).
Preface; introduction.

ETYM See Preamble (n.).
To make a preamble.

Singular of preambles is preamble.