ancillary

adjective

an·​cil·​lary ˈan(t)-sə-ˌler-ē 

-ˌle-rē,

 especially British  an-ˈsi-lə-rē

1

: subordinate, subsidiary

the main factory and its ancillary plants

2

: auxiliary, supplementary

the need for ancillary evidence

ancillary expenses

ancillary equipment

ancillary noun

Did you know?

If you’re already familiar with ancillary, pull up a chair and help yourself to a side dish of trivia. The word comes from the Latin word ancilla, meaning "a female servant," which also gave us the rarer English word ancilla, meaning "an aid to achieving or mastering something difficult." While the English ancilla (which made its debut a couple of centuries after ancillary) is unlikely to be encountered except in very specialized contexts (such as philosophy or quantum computing), ancillary picks up on the notion of providing aid or support in a way that supplements something else. In particular, the word often describes something that is in a position of secondary importance, such as the "ancillary products in a company's line."

Examples of ancillary in a Sentence

The lockout rocked the NHL, but among the ancillary benefits has been the emergence of young players who apprenticed for an additional season in the minors … —Michael Farber, Sports Illustrated, 21 Nov. 2005

I am in love with a man who is in love with boats. As far as ancillary loves are concerned, I understand things could be worse. Sadly, I do not love boats. —Ann Patchett, Gourmet, May 2003

Traditionally museums have been built to house collections, and for ancillary functions such as storage, conservation, administration, and education. —Jayne Merkel, Wilson Quarterly, Winter 2002

Paleolithic hunters and gatherers obtained an abundance of complete protein, mostly from wild game; their vegetable foods were an ancillary protein source. This pattern prevailed until agriculture transformed it, shifting the human diet away from meat and toward plant food. —S. Boyd Eaton et al., The Paleolithic Prescription, 1988

The company hopes to boost its sales by releasing ancillary products.

Recent Examples on the Web

Those ancillary upgrades are nice, but the big changes are still the chips. —Antonio G. Di Benedetto, The Verge, 30 Oct. 2024

This is also what makes making more content so tempting — the original Star Wars and The Empire Strikes Back were profoundly amazing, and so captivated generations of fans, and have launched literally thousands of products and generated billions in direct and ancillary revenue. —James Hibberd, The Hollywood Reporter, 3 Oct. 2024

Looking To The Future As Bhutan Wine Company gradually turns experiment into achievement with their first commercial production, in the meantime, the company’s already realized success in the form of their project’s ancillary opportunities for Bhutan. —Jillian Dara, Forbes, 21 Oct. 2024

The Apprentice hopes to hold screens through the elections, fueling a rosier ancillary future that would be helped by nominations. —Mike Fleming Jr, Deadline, 11 Oct. 2024

Word History

Etymology

see ancilla

First Known Use

1663, in the meaning defined at sense 1

Podcast

Get Word of the Day delivered to your inbox!

Medical Definition

ancillary

1 of 2 adjective

an·​cil·​lary

ˈan(t)-sə-ˌler-ē, especially British an-ˈsil-ə-rē

: being auxiliary or supplementary

use of a drug as ancillary to surgical treatment

ancillary staff

ancillary diagnostic services

ancillary

2 of 2 noun

plural ancillaries

1

British : one who assists or is supplementary to another person

2

: a supplemental diagnostic or therapeutic medical service (as magnetic resonance imaging or radiotherapy)

Legal Definition

ancillary

adjective

an·​cil·​lary ˈan-sə-ˌler-ē, an-ˈsi-lə-rē 

1

: having a subordinate, subsidiary, or secondary nature

ancillary functions

an ancillary agreement

2

: serving as a supplement or addition

ancillary documents

3

: directly related

ancillary claims