[uh-blig-uh-tawr-ee, -tohr-ee, ob-li-guh-]
required as a matter of obligation; mandatory: A reply is desirable but not obligatory.
incumbent or compulsory (usually followed by on or upon ): duties obligatory on all.
imposing moral or legal obligation; binding: an obligatory promise.
creating or recording an obligation, as a document.

1425–75; late Middle English < Late Latin obligātōrius binding, equivalent to Latin obligā(re) to bind (see obligate) + -tōrius -tory1

obligatorily [uh-blig-uh-tawr-uh-lee, ‐tohr‐, ob-li-guh, uh-blig-uh-tawr-uh-lee, tohr, ob-li-guh] , adverb
obligatoriness, noun
nonobligatorily, adverb
nonobligatory, adjective
unobligatory, adjective

2. necessary, imperative.

2. voluntary.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To obligatory
World English Dictionary
obligatory (ɒˈblɪɡətərɪ, -trɪ)
1.  required to be done, obtained, possessed, etc
2.  of the nature of or constituting an obligation

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Example sentences
She would show up for any obligatory cause, cultural event or party, if only
  someone asked.
But if you're going to note that, it seems obligatory to also note that he
  doesn't believe this is probable.
During his obligatory spell in the civil service, he was the youngest to reach
  the top rank.
Of course, there's also the obligatory guarantee that you'll see a whale, or
  you get another opportunity at no cost.
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature