1. increase rapidly in numbers; multiply: "the science fiction magazines that proliferated in the 1920s"
▪ (of a cell, structure, or organism) reproduce rapidly: "the Mediterranean faces an ecological disaster if the seaweed continues to proliferate at its present rate"
▪ cause (cells, tissue, structures, etc.) to reproduce rapidly:"electromagnetic radiation can only proliferate cancers already present"
Word Originlate 19th century: back-formation from proliferation.