Solemn

a.
  1. Marked with religious rites and pomps; enjoined by, or connected with, religion; sacred.
  2. Pertaining to a festival; festive; festal.
  3. Stately; ceremonious; grand.
  4. Fitted to awaken or express serious reflections; marked by seriousness; serious; grave; devout; as, a solemn promise; solemn earnestness.
  5. Real; earnest; downright.
  6. Affectedly grave or serious; as, to put on a solemn face.
  7. (Law) Made in form; ceremonious; as, solemn war; conforming with all legal requirements; as, probate in solemn form.
    8. Solemn League and Covenant .
    See Covenant, 2.