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Simultaneously vs Both - What's the difference?

simultaneously | both |

As an adverb simultaneously

is occurring at the same time.

As a determiner both is

each of the two; one and the other.

As a conjunction both is

including both (used with and.

simultaneously

English

Adverb

(-)
  • Occurring at the same time.
  • *
  • The hens woke up squawking with terror because they had all dreamed simultaneously of hearing a gun go off in the distance.
  • *{{quote-magazine, date=2013-07-19, author=(Timothy Garton Ash)
  • , volume=189, issue=6, page=18, magazine=(The Guardian Weekly) , title= Where Dr Pangloss meets Machiavelli , passage=Hidden behind thickets of acronyms and gorse bushes of detail, a new great game is under way across the globe. Some call it geoeconomics, but it's geopolitics too. The current power play consists of an extraordinary range of countries simultaneously sitting down to negotiate big free trade and investment agreements.}}

    both

    English

    Alternative forms

    * bothe (archaic)

    Determiner

    (en determiner)
  • Each of the two; one and the other.
  • * (Bible), (w) xxi. 27
  • Abraham took sheep and oxen, and gave them unto Abimelech; and both of them made a covenant.
  • * (1678-1751)
  • He will not bear the loss of his rank, because he can bear the loss of his estate; but he will bear both , because he is prepared for both.
  • *
  • Mind you, clothes were clothes in those days. There was a great deal of them, lavish both in material and in workmanship.
  • * {{quote-magazine, date=2013-07-19, author= Ian Sample
  • , volume=189, issue=6, page=34, magazine=(The Guardian Weekly) , title= Irregular bedtimes may affect children's brains , passage=Irregular bedtimes may disrupt healthy brain development in young children, according to a study of intelligence and sleeping habits.  ¶ Going to bed at a different time each night affected girls more than boys, but both fared worse on mental tasks than children who had a set bedtime, researchers found.}}
  • (obsolete) Each of more than two.
  • * (Oliver Goldsmith) (1730-1774)
  • Both mongrel, puppy, whelp, and hound.
  • * (Samuel Taylor Coleridge) (1772-1834)
  • He prayeth well who loveth well both man and bird and beast.

    Conjunction

    (English Conjunctions)
  • including both (used with and)
  • Both you and I are students

    See also

    (various semantically related terms) * * * couple * double * dual * neither * pair * second * twice * two