Unique energy incorporated in switch settings?

• Done only once
• Unique event I discounted?
• Unique person
• Unique type of switch saving energy?

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.

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.

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... ...