n.

1. 纪念物；纪念碑；纪念馆；纪念活动[C][（+to）]
   The service is a memorial to those killed in the war.

   祈祷仪式是为纪念在战争中牺牲的人。

2. 记录；编年史[P]
3. 陈情书，请愿书[C]
   present a memorial to the king

   向国王呈递请愿书

a.

1. 纪念的；追悼的；记忆的
   a memorial speech

   悼词

n.

1. a structure or statue established in memory of a person or event.
   ▸ [as modifier] intended to commemorate someone or something:

   a memorial service.
2. chiefly historical a statement of facts, especially as the basis of a petition.
   ▸a written record.