If you lasso an animal, you catch it by throwing a lasso round its neck and pulling it tight. Cowboys drove covered wagons and rode horses, lassoing cattle. lassos lassoes a rope with one end tied in a circle, used to catch cattle and horses, especially in the western US. to catch an animal using a lasso
{i} rope with a noose at one end which is used to capture cattle; tool in a graphics program which allows one to make a freehand selection of part of an image (Computers)