n. 1.any condition that makes it difficult to make progress or to achieve an objective 2.a barrier set up by police to stop traffic on a street or road in order to catch a fugitive or inspect traffic etc.
Fact
It took Leonardo Da Vinci 10 years to paint Mona Lisa. He never signed or dated the painting. Leonardo and Mona had identical bone structures according to the painting. X-ray images have shown that there are 3 other versions under the original. .. More >>