both

UK: /ˈbəʊθ/ US: /boʊθ/ ,(bōth)

WordReference Random House Learner's Dictionary of American English © 2025

both /boʊθ/   adj. [before a noun]

1. [~ + (the +) plural noun] one and the other;
   two together:
   I met both sisters. I met both the sisters.

pron. 

2. the one as well as the other:
   [Both were ill. I'll work or play but I can't do both.]
   [~ + of]
   Both of us were ill. I want to see both of you now.

conj. 

3. alike;
   equally:
   I am both ready and willing. I can speak both English and Russian.

WordReference Random House Unabridged Dictionary of American English © 2025

both  (bōth), adj. 

1. one and the other;
   two together:
   He met both sisters. Both performances were canceled.

pron. 

2. the one as well as the other:
   Both of us were going to the party.

conj. 

3. alike;
   equally:
   He is both ready and willing.

• *bai thai); replacing Middle English bo, ba, Old English bā; cognate with Gothic bai; akin to Latin ambō, Greek ámphō, Lithuanian abù, Sanskrit ubháu
• 1125–75; Middle English bothe, bathe, influenced by Scandinavian (compare Old Norse bāthir both; cognate with German, Dutch beide, Gothic ba tho skipa both (the) ships, Old High German bêde

Collins Concise English Dictionary © HarperCollins Publishers::

both / bəʊθ/ determiner

1. the two; two considered together: both dogs were dirty
2. (as pronoun): both are to blame

conjunction

1. (coordinating) used preceding words, phrases, or clauses joined by and, used to emphasize that not just one, but also the other of the joined elements is included: both she and her sister enjoyed the play, both new and exciting

Etymology: 12th Century: from Old Norse bāthir; related to Old High German bēde, Latin ambō, Greek amphō