What does expirable mean?
Expirable is a relatively rare English adjective meaning capable of expiring — that is, having a built-in end point after which it ceases to be valid or effective. It is formed from the verb 'expire', which traces back through Old French to the Latin 'expirare', meaning 'to breathe out'. While 'expire' and its familiar nouns 'expiration' and 'expiry' are common in everyday language, 'expirable' occupies a narrower niche, appearing chiefly in technical, legal, and administrative writing. Software engineers use it to describe tokens, sessions, passwords, and cached data designed to lapse automatically after a defined period, while lawyers may apply it to clauses or rights that terminate on schedule. The word carries no strong emotional charge; it simply signals that something has been deliberately given a lifespan. For anyone working with systems where validity windows matter, it offers a compact, precise way to flag that quality.
adjectiveCapable of expiring or coming to an end; subject to termination after a fixed period of time.
- Capable of expiring or lapsing after a set period of time; subject to automatic termination.
"The API uses expirable access tokens that must be refreshed every hour."
"All refresh tokens issued by the service are expirable and must be renewed within thirty days."
"The contract included an expirable non-compete clause that lapsed after two years."
Expirable is so rare in general English that you'll most often meet it hiding in software documentation, quietly describing the tokens and passwords that keep your accounts safe.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does expirable come from?
Expirable derives from the verb 'expire', which entered English from Old French 'expirer', itself from the Latin 'expirare', combining 'ex-' ('out') and 'spirare' ('to breathe'). The original literal sense — to breathe one's last — survives in poetic uses of 'expire', while the modern sense of coming to a formal end developed later. The adjectival suffix '-able' turns the verb into a descriptor of capacity. The same Latin root 'spirare' gives English a whole family of breathing-related words, including 'inspire', 'respire', 'perspire', and 'conspire'.
Related word forms
How expirable is actually used
Expirable is a formal, technical-sounding adjective that appears far more often in computing, security, and legal contexts than in everyday speech. It carries a neutral connotation, simply signalling a built-in end date rather than anything negative. In casual conversation, speakers usually prefer phrases like 'set to expire' over this single-word form.
Easily confused with expirable
Expiable means capable of being atoned for or forgiven, whereas expirable means liable to expire or lapse with time.