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Portland

in Portland cement, 1720, named by its inventor, English mason Joseph Aspdin, from resemblance of the color to the stone of Portland peninsula on the coast of Dorsetshire. The place name is literally "land surrounding a harbor," Old English Portlanda. Portland, Maine, U.S.A., took its name 1786, for the place in England. Portland, Oregon, was said to have been named for the city in Maine, which won the honor by a coin toss over Boston.

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Definitions of Portland from WordNet

Portland (n.)
freshwater port and largest city in Oregon; located in northwestern Oregon on the Willamette River which divides the city into east and west sections; renowned for its beautiful natural setting among the mountains;
Portland (n.)
largest city in Maine in the southwestern corner of the state;
From wordnet.princeton.edu