Source : Webster's Revised Unabridged Dictionary (1913)

Pan-American Congress \Pan-American Congress\
   Any of several meetings of delegates from various American
   states; esp.:
   (a) One held in 1889-90 in the United States, at which all
       the independent states except Santo Domingo were
       represented and of which the practical result was the
       establishment of the Bureau of American Republics for the
       promotion of trade relations.
   (b) One held in Mexico in 1901-1902.
   (c) One held at Rio de Janeiro in 1906.