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Longman Dictionary of Contemporary English
obligate
verb
COLLOCATIONS FROM CORPUS
■ VERB
feel
▪ Do not feel obligated to drive faster than is comfortable for you just because others do.
▪ Doing something you feel obligated to do is not bad.
▪ You can make people follow you by scaring them, and you can make people follow by having them feel obligated.
▪ A.. No, but they usually do because they feel obligated to follow the wishes of the caucus-goers.
EXAMPLES FROM CORPUS
▪ Do not feel obligated to drive faster than is comfortable for you just because others do.
▪ Does his confession obligate his wife to be reconciled to him?
▪ Doing something you feel obligated to do is not bad.
▪ Now, the Supreme Court is not obligated to send a consistent cultural message.
▪ There is nothing that obligates the university to give her any raises in the future.
The Collaborative International Dictionary
Obligate

Obligate \Ob"li*gate\, v. t. [imp. & p. p. Obligated; p. pr. & vb. n. Obligating.] [L. obligatus, p. p. of obligare. See Oblige.]

  1. To bring or place under obligation, moral or legal; to hold by a constraining motive. ``Obligated by a sense of duty.''
    --Proudfit.

    That's your true plan -- to obligate The present ministers of state.
    --Churchill.

  2. To bind or firmly hold to an act; to compel; to constrain; to bind to any act of duty or courtesy by a formal pledge.

    That they may not incline or be obligated to any vile or lowly occupations.
    --Landor.

Douglas Harper's Etymology Dictionary
obligate

1540s, "to bind, connect;" 1660s, "to put under moral obligation," back-formation from obligation, or else from Latin obligatus, past participle of obligare (see oblige). Oblige, with which it has been confused since late 17c., means "to do one a favor." Related: Obligated; obligating.

Wiktionary
obligate
  1. 1 (context biology English) Able to exist or survive only in a particular environment or by assuming a particular role. 2 Absolutely indispensable; essential. v

  2. 1 (context transitive North America Scottish English) To bind, compel, constrain, or oblige by a social, legal, or moral tie. 2 (context transitive North America Scottish English) To cause to be grateful or indebted; to oblige. 3 (context transitive North America Scottish English) To commit (money, for example) in order to fulfill an obligation.

WordNet
obligate

adj. restricted to a particular condition of life; "an obligate anaerobe can survive only in the absence of OXYGen" [ant: facultative]

obligate
  1. v. force or compel somebody to do something; "We compel all students to fill out this form" [syn: compel, oblige]

  2. commit in order to fulfill an obligation; "obligate money"

  3. bind by an obligation; cause to be indebted; "He's held by a contract"; "I'll hold you by your promise" [syn: oblige, bind, hold]

Wikipedia
Obligate

As an adjective, obligate means "by necessity" (antonym facultative) and is used mainly in biology in phrases such as:

  • Obligate aerobe, an organism that cannot survive without oxygen
  • Obligate anaerobe, an organism that cannot survive in the presence of oxygen
  • Obligate air-breather, a term used in fish physiology to describe those that respire entirely from the atmosphere
  • Obligate biped, Bipedalism designed to walk on two legs
  • Obligate carnivore, an organism dependent for survival on a diet of animal flesh.
  • Obligate hibernation, a state of inactivity in which some organisms survive conditions of insufficiently available resources.
  • Obligate intracellular parasite, a parasitic microorganism that cannot reproduce without entering a suitable host cell
  • Obligate parasite, a parasite that cannot reproduce without exploiting a suitable host
  • Obligate photoperiodic plant, a plant that requires sufficiently long or short nights before it initiates flowering, germination or similarly functions
  • Obligate symbionts, organisms that can only live together in a symbiosis

Usage examples of "obligate".

Also, in a suit to enforce double liability, brought in Rhode Island against a stockholder in a Kansas trust company, the courts of Rhode Island were held to be obligated to extend recognition to the statutes and court decisions of Kansas whereunder it is established that a Kansas judgment recovered by a creditor against the trust company is not only conclusive as to the liability of the corporation but also an adjudication binding each stockholder therein.

Because we previously envisioned all matter particles and all force particles to be pointlike objects with literally no spatial extent, we were obligated to consider properties of the universe on arbitrarily short distance scales.

It had taken Laundress a while to make her understand what they wanted of her, but now she seemed to feel obligated to give Maggie a tour.

Under the strict letter of interstellar law, a warship was always obligated to demand compliance with its instructions before firing into a merchantship, and a naval officer ignored that obligation at her peril.

He favors ten-dollar knives over the hundred-dollar versions because when he loses the cheaper ones, he does not feel obligated, under the pressure of narcosis, to risk his life searching the bottom to res cue them.

Thus, it by no means believes in an equality of races, but along with their difference it recognizes their higher or lesser value and feels itself obligated to promote the victory of the better and stronger, and demand the subordination of the inferior and weaker in accordance with the eternal will that dominates this universe.

If they joined their fellows in this holy war against mages, not only would the Archpriest be responsible for their actions, he would be obligated to see to it that they were stopped.

Deputy Chief of CTC Ben Bonk noted in the talking points that the CTC had obligated 50 percent of its fiscal year 2000 budget by Jan.

They are obligated to delete the stored lives of anyone who falls under Hortator prohibition.

I was obligated to postpone the purchase of a mahogany scrutoire for my study, as I had intended.

As I was their Summoner, however, they were obligated to answer any questions I put to them.

Gail felt obscurely obligated to the apprentice for her uncharitable thought that had marked him down as dimmer than he actually was.

I speak of you to His Divine Majesty, Who, respecting that love, rewarding you so benificently, answers my prayers, and renders us ever more greatly obligated to Him, while we are also deeply indebted to all those people who have given you their goodwill and aid, and especially to those most preeminent nobles who are your hosts.

I will be interested to hear how that sits with the testimony of some of those artisans formerly obligated to you, who have been finding surprising conditions attached to your so-called gifts.

I remain confident that we could repulse an attack, but I am obligated to report that they are learning slowly how to dupe our dovin basals and frustrate our weapons.