solemn

1. ADJ Someone or something that is solemn is very serious rather than cheerful or humorous. (人) 严肃的; (物) 庄严的

His solemn little face broke into smiles. 他那严肃的小脸绽开了笑容。

2. solemnityN-UNCOUNT 严肃; 庄严

The setting for this morning's signing ceremony matched the solemnity of the occasion. 今天早上签字仪式的布置符合这种场合的庄严气氛。

3. ADJ A solemn promise or agreement is one that you make in a very formal, sincere way. 正式的; 郑重的

She made a solemn promise to him when they became engaged that she would give up cigarettes for good. 他们订婚时，她向他许下郑重的承诺，说她会永远戒烟。