Unique type of switch saving energy?

• Unique person
• Done only once
• Unique event I discounted?
• Unique energy incorporated in switch settings?

WordNet Word definitions in WordNet
n. a happening that occurs only once and is not repeated

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
I. adjective COLLOCATIONS FROM CORPUS ■ NOUN payment ▪ In addition, a number of one-off payments were made to the Partnerships. ▪ This is a one-off payment which protects the lender in case you default on the loan. EXAMPLES FROM CORPUS ▪ In fact the whole ...

Wikipedia Word definitions in Wikipedia
A one-off is something made or occurring only once, independent of any pattern. It may also refer to: One-off housing , individual houses built outside of towns and villages, especially in Ireland One Off (OVA) , a video animation by Junichi Sato One Offs... ...

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
"single example of a manufactured product," 1934, from one + off . Later given figurative extension.

Wiktionary Word definitions in Wiktionary
a. Occurring once, one-time, independent of any pattern. n. (context idiomatic English) Something that is done, created, etc. only once, and often quickly, simply, or improvisationally.