According to Merriam-Webster, bespoke means custom-made (a bespoke suit) or dealing in or producing custom-made articles.

 

According to Wikipedia, bespoke is "a British English term employed in a variety of applications to mean an item custom-made to the buyer's specification. While applied to many items now, from computer software to luxury car appointments, the term historically was applied only to tailored clothing, shirts, and other parts of men's apparel involving measurement and fitting. The distinguishing points of bespoke tailoring are the buyer's total control over the fabric used, the features and fit, and the way the garment should be made. More generally, bespoke describes a high degree of customization, and involvement of the end-user, in the production of the good.

 

Apparel Search lets SearchCIO-midmarket.com elaborate on the definition. "Bespoke is a term used in the United Kingdom and elsewhere for an individually or custom-made product or service. Traditionally applied to custom-tailored clothing, the term has been extended to information technology, especially for software consulting services. Typically, software consulting companies offer packaged (already invented and generally applicable) software and bespoke software for client needs that can't be satisfied by packaged software. In the U.S., bespoke software is often called custom or custom-designed software. Bespoke is a form derived from bespeak, which was used as early as 1583 to refer to the ordering of goods."

 

Synonyms include custom, customized, custom-tailored, made-to-order, tailored, or tailor-made. Antonyms include ready-made or mass-produced.