There are 3 main definitions of or in English:

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or1

Line breaks: or
Pronunciation: /ɔː
 
/

conjunction

1Used to link alternatives: a cup of tea or coffee are you coming or not? I either take taxis or walk everywhere it doesn’t matter whether the theory is right or wrong
More example sentences
  • The café is a great place for locals to meet up for a chat over a cup of tea or coffee.
  • She never learned to read or write.
  • School administrators should work to ensure that the majority of students can walk or bike to school.
2Introducing a synonym or explanation of a preceding word or phrase: yoga is a series of postures, or asanas
More example sentences
  • Joshua was born weighing just 18 ounces - half a kilo or just over a pound.
  • Spain entered the twentieth century having lost its colonies in the New World and the Pacific in the Spanish-American War or, as it is known in Spain, the War of 1898.
  • By early Tuesday he was dead - a victim of the most deadly of the world's culinary delicacies, the blowfish or fugu.
3Otherwise (used to introduce the consequences of something not being done or not being the case): hurry up, or you’ll miss it all
More example sentences
  • Hurry up, or you'll be late for class.
  • We do have to leave now or we won't be back until after sunset.
  • I'd better tell him myself or I'll get in even more trouble.
4Introducing an afterthought, usually in the form of a question: John’s indifference—or was it?—left her unsettled
More example sentences
  • It was just an accident … or was it?
  • Emily, unaware of the mental battle that was going on in his mind (or was she?), kept on walking towards him.
5 archaic Either: to love is the one way to know or God or man
More example sentences
  • Learn that to love is the one way to know Or God or man.

noun

(OR) Back to top  
1A logical operation which gives the value one if at least one operand has the value one, and otherwise gives a value of zero.
1.1 [as modifier] Electronics (also OR gate) Denoting a gate circuit which produces an output if there is a signal on any of its inputs.

Origin

Middle English: a reduced form of the obsolete conjunction other (which superseded Old English oththe 'or'), of uncertain ultimate origin.

Usage

1 Where a verb follows a list separated by or, the traditional rule is that the verb should be singular, as long as the things in the list are individually singular, as in a sandwich or other snack is included in the price (rather than a sandwich or other snack are included in the price). The argument is that each of the elements agrees separately with the verb. The opposite rule applies when the elements are joined by and: here, the verb should be plural: a sandwich and a cup of coffee are included in the price. These traditional rules are observed in good English writing style but are often disregarded in speech.2 On the use of either ... or, see either (usage).

Phrases

or else

1
see else.

or so

2
(After a quantity) approximately: a dozen or so people
More example sentences
  • The last hour or so is as close to the magic of the original trilogy as you can get in my book.
  • José Luis is in his forties and has a group of a dozen or so mates he has been hanging out with all his life.
  • I saw a local reporter for one of the news stations and about a dozen or so protesters.

Definition of or in:

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There are 3 main definitions of or in English:

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or2

Line breaks: or
Pronunciation: /ɔː
 
/

noun

[mass noun]
Gold or yellow, as a heraldic tincture.

Origin

early 16th century: from French, from Latin aurum 'gold'.

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There are 3 main definitions of or in English:

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OR3

Line breaks: OR

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