Meaning

• To enter by running.

  "He ran into the building."

• To collide with.

  "He lost control of the vehicle and ran into a tree."

• To cause to collide with.

  "He lost control of the vehicle and ran it into a tree."

• (by extension) To encounter or meet unexpectedly (literally or figuratively).

  "Everything was going according to plan until we ran into the legal problems."

• (of flowing water) To reach, to flow into (a body of water).

• To blend into; to be followed by or adjacent to without there being a clear boundary.

• To cause to blend into.

  "You can use the paintbrush this way to run the colors into each other."

• To reach a large figure.

  "By the end, the cost of the project ran into the millions of dollars."