Noun
A light fabric, originally made in the East Indies, of silk and linen, usually having alternating stripes, and a slightly craped or puckered surface; also, a cotton fabric of similar appearance.
Source: Webster's dictionaryBecause seersucker is a bit less formal, it can be worn with or without a tie, with an Oxford cloth button-down shirt or a knit polo shirt, when and where the settings are appropriate. Source: Internet
He nervously flagged down guitar and harmonica legend Frank Edwards on the street to give him a handbill (the bluesman was easily recognizable in his lime-green seersucker), and they ended up sharing a stage at his next gig. Source: Internet
Guest arrived wearing seersucker suits, yachting blazers, sundresses, silk cravats, bold bow ties, fascinators, sun hats and their nautical best. Source: Internet