solemn; sublime; grand; magnificent; impressive
「荘厳」 has another reading with different meanings.
荘厳な雰囲気の中で式典が行われた。
The ceremony was held in a solemn atmosphere.
荘厳な山岳風景に心を打たれた。
I was struck by the sublime mountain scenery.
神殿の荘厳さに参拝者は息を呑んだ。
The visitors were awed by the solemnity of the shrine.