Betrothed

engaged to be married:
she is betrothed to that young lieutenant.
the person to whom one is engaged:
he introduced us to his betrothed.
to arrange for the marriage of; affiance (usually used in p-ssive constructions):
the couple was betrothed with the approval of both families.
archaic. to promise to marry.
contemporary examples

best ‘game of thrones’ season yet andrew romano june 15, 2014
valar morghulis: game of thrones’ women are going to rule the world scott bixby june 16, 2014
prince william surprises crowd april 29, 2011
‘noah’ review: an ambitious, flawed biblical tale that you have to see andrew romano march 27, 2014
the sad hidden plight of child grooms nina strochlic september 17, 2014

historical examples

the kentucky ranger edward t. curnick
the bacillus of beauty harriet stark
jewish children sholem naumovich rabinovich
alice, or the mysteries, complete edward bulwer-lytton
joanna g-dden sheila kaye-smith

adjective
engaged to be married: he was betrothed to her
noun
the person to whom one is engaged; fiancé or fiancée
verb
(transitive) (archaic) to promise to marry or to give in marriage
adj.
v.