(transitive, US) To make solemn, or official, through ceremony or legal act.The couple chose to solemnize their relationship in a secular ceremony, instead of having a wedding.
HookerBaptism to be administered in one place, and marriage solemnized in another.
MiltonTheir choice nobility and flowers ... Met from all parts to solemnize this feast.
To make grave, serious, and reverential.
J. C. ShairpWordsworth was solemnized and elevated by this his first look on Yarrow.
L. WallaceEvery Israelite ... arose, solemnized his face, looked towards Jerusalem ... and prayed.