/ˈsɛlɪbət/
[adjective] Describing a person who chooses not to marry or have sexual relationships, often for religious reasons. It can also describe the state of being unmarried or abstaining from sex.
Celibate originally meant simply 'unmarried' — the idea of avoiding sex entirely came much later.
The word 'celibate' traces back to the Latin noun 'caelebs', meaning 'unmarried' or 'single'. This Latin root is ancient and appears in the writings of Roman poets such as Horace and Ovid, where it described a bachelor — a man without a wife — without any particular moral or religious weight attached to it. Interestingly, some scholars believe 'caelebs' may be connected to a Proto-Indo-European root related to 'living alone', possibly linked to the Sanskrit word 'kevala', meaning 'alone' or 'only', though this connection remains debated among linguists.
From 'caelebs', Latin formed the noun 'caelibatus', meaning the state of being unmarried or the condition of bachelorhood. This is the direct ancestor of the English word. The path of transmission is clear: Latin 'caelebs' → Latin 'caelibatus' → English 'celibate'. English borrowed 'celibate' directly from the Latin root in the early 17th century, most likely through learned and ecclesiastical writing rather than through an intermediate language like French.
When it first entered English, 'celibate' meant simply 'unmarried' — just as it had in Latin. A celibate person was one who had not taken a spouse, full stop. The word carried no strong implication of sexual abstinence. This is surprising to modern readers, because today we almost always use 'celibate' specifically to mean someone who refrains from sexual activity, often as a matter of religious commitment or personal choice.
The shift in meaning happened gradually, and the rise of the Christian Church played a major role. As the Catholic Church developed its rules requiring priests and monks to remain unmarried, the concept of celibacy became tightly bound to religious duty. The Latin 'caelibatus' was the official term for this priestly condition, and it became loaded with the idea of spiritual discipline and the rejection of bodily pleasure, not just the legal fact of being unmarried. Over centuries, English speakers absorbed this religious meaning so completely that the older, neutral sense of 'simply unmarried' faded almost entirely away.
By the 19th and 20th centuries, 'celibate' had fully settled into its modern meaning: someone who deliberately avoids sexual relationships. Interestingly, this created a subtle gap between 'celibate' and 'chaste'. Chastity, from Latin 'castus' meaning 'pure', is about sexual purity in a broader sense and can apply even within marriage. Celibacy, by contrast, implies a total absence of sexual partnership. The two words are close neighbours in meaning but are not identical, and careful writers still distinguish between them. The journey of 'celibate' — from a Roman bachelor minding his own business to a figure of spiritual devotion — is a small but vivid lesson in how religion reshapes the very words we use.