/ ˈdʒaɪənt; NAmE / noun , adjective
■ noun
1.
(in stories) a very large strong person who is often cruel and stupid
—see also giantess
2.
an unusually large person, animal or plant :
He's a giant of a man.
3.
a very large and powerful organization :
the multinational oil giants
4.
a person who is very good at sth :
literary giants
■ adjective
[ only before noun ] very large; much larger or more important than similar things usually are :
a giant crab
a giant-size box of tissues
a giant step towards achieving independence
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WORD ORIGIN
Middle English geant (with the first syllable later influenced by Latin gigant- ), from Old French , via Latin from Greek gigas , gigant- .