Bijou/ˈbiːʒuː/ Definition 1 of 2Pro Tip 1/3Value Implied When used to describe items, 'bijou' suggests they are treasured, not just their size. The jeweler showcased several bijous in the display case. Pro Tip 2/3Not Everyday Items Items called 'bijou' are often saved for special occasions, not everyday use. She wore her bijou necklace only at gala events. Pro Tip 3/3Affectionate Tone Using 'bijou' can convey affection or admiration for the small item in question. This bijou of a music box plays a lovely tune.