The following paragraph discusses RQ-180 aircraft. What is the meaning of highly swept that has been used as an adjective for body?
The aircraft uses a version of Northrop’s stealthy “cranked-kite” de- sign, as does the X-47B, with a highly swept centerbody and long, slender outer wings. Northrop Grumman en- gineers publicly claimed (before the launch of the classified program) that the cranked-kite is scalable and adapt- able, in contrast to the B-2’s shape, which has an unbroken leading edge. The RQ- 180’s centerbody length and volume can be greater relative to the vehicle’s size.
I don't understand what sweep means in aircraft wing context. Another example follows:
Maintaining a high degree of laminar flow on a swept wing is an achievement in itself, because spanwise air flow tends to induce turbulence and is not made any easier by possible spillage from overwing inlets.
Having looked up the entry "sweep", I don't seem to understand what it means with wing.