Lawn is a type of cloth used in dresses, blouses, etc. So the chorus lyrics are literally referring to clothes drying outside. I'll leave the figurative meaning up to someone else.
From the Wikipedia page:
"The term "lawn" derives from "Laon", a city in France, which produced large quantities of linen lawn. Lawn cloth commonly is used for dresses, blouses, nightwear, underwear, lingerie, curtains, collar cuffs, shirting, infant wear, and handkerchiefs."
Lawn is a type of cloth used in dresses, blouses, etc. So the chorus lyrics are literally referring to clothes drying outside. I'll leave the figurative meaning up to someone else.
From the Wikipedia page:
"The term "lawn" derives from "Laon", a city in France, which produced large quantities of linen lawn. Lawn cloth commonly is used for dresses, blouses, nightwear, underwear, lingerie, curtains, collar cuffs, shirting, infant wear, and handkerchiefs."
http://en.wikipedia.org/wiki/Lawn_cloth