as a reminder, especially a ritual or official one作为纪念（物）（尤指以仪式或官方方式）
柯林斯高阶英汉双解学习词典释义
VERB
纪念
To commemorate an important event or person means to remember them by means of a special action, ceremony, or specially created object.
例句
One room contained a gallery of paintings commemorating great moments in baseball history...有一个房间里陈列着很多纪念棒球史上伟大时刻的画作。The 200th anniversary of Mozart's death is being commemorated around the world with concerts featuring his work.世界各地将举办以莫扎特的作品为主题的音乐会，以纪念他逝世200周年。
英汉词典释义
n.
纪念;纪念仪式
People are lining up to buy commemoration stamps.人们正在排队购买纪念邮票。This monument has been erected in commemoration of the victory over the enemy.这纪念碑是为纪念战胜敌军而建立的。
英英词典释义
Noun
1. a ceremony to honor the memory of someone or something