mobcap n large high frilly cap with a full crown; formerly worn indoors by women Usage(s) The other figure was a buxom octoroon woman in her 30's, wearing a high white turbanish mobcap, a bright embroidered shawl and a black silk dress. Reason: she wore a frilled white mobcap and dress, pink sash and shoes similar to those made famous by Sir Joshua Reynolds in his portrait Simplicity. The locks which strayed from her close mobcap were most evidently the growth of other times.