Meaning of commemorate

(verb) celebrate by some ceremony or observation; "The citizens mark the anniversary of the revolution with a march and a parade"

call to remembrance; keep alive the memory of someone or something, as in a ceremony; "We remembered the 50th anniversary of the liberation of Auschwitz"; "Remember the dead of the First World War"

be or provide a memorial to a person or an event; "This sculpture commemorates the victims of the concentration camps"; "We memorialized the Dead"