All 5 Uses

solemn
in
A Streetcar Named Desire
(Auto-generated)

They cross to it solemnly, Stuff busies himself at the bar, which is barely lit.†
Scene 2.2

solemnly = with seriousness and dignity
Mitch [solemnly]: Lost?†
Scene 3.6
You have been so anxious and solemn all evening, and so have I; we have both been anxious and solemn and now for these few last remaining moments of our lives together — I want to create —joie de vivre!†
Scene 3.6

solemn = very serious--possibly dignified
You have been so anxious and solemn all evening, and so have I; we have both been anxious and solemn and now for these few last remaining moments of our lives together — I want to create —joie de vivre!†
Scene 3.6
I don't know what's the matter, we're all so solemn.
Scene 3.8 *

solemn = serious

Definitions:

(1) (solemn)
in a very serious (and often dignified) manner
(2) (meaning too rare to warrant focus)
Less commonly, solemn can mean that something was done with great or appropriate ceremony. It can also be used to describe something as dark or undecorated.