add by mixing or blending on or attaching; "work in the butter and the dough will get the right consistency"; "In his speech, the presidential candidate worked in a lot of learned words"
march aggressively into another's territory by military force for the purposes of conquest and occupation; "Hitler invaded Poland on September 1, 1939"
penetrate or assault, in a harmful or injurious way; "The cancer had invaded her lungs"
occupy in large numbers or live on a host; "the Kudzu plant infests much of the South and is spreading to the North"
the extended spatial location of something; "the farming regions of France"; "religions in all parts of the world"; "regions of outer space"
a large indefinite location on the surface of the Earth; "penguins inhabit the polar regions"
the approximate amount of something (usually used prepositionally as in `in the region of'); "it was going to take in the region of two or three months to finish the job"; "the price is in the neighborhood of $100"
occur between other event or between certain points of time; "the war intervened between the birth of her two children"
get involved, so as to alter or hinder an action, or through force or threat of force; "Why did the U.S. not intervene earlier in WW II?"
be placed or located between other things or extend between spaces and events; "This interludes intervenes between the two movements"; "Eight days intervened"