An example of slacks is the nice pair of pants you put on to go to work.
While Paul was dressed in jeans and a golf shirt, brother Joseph—never "Joe"—sat stiffly in creased slacks and dress shirt.
She was dressed in a pair of light colored slacks, a pale blue blouse and was barefoot.
She wore white slacks, an emerald-green silk blouse and high-heeled shoes.
"This is the only good part of the afternoon," he muttered, pulling out a pair of wrinkled slacks and holding them up.
When the show was over, Dean carefully laid out his new slacks over the back of his chair and reluctantly went to shower—and shave.