upsize

UK: /ˈʌpˌsaɪz/ US: (up′sīz′)

Inflections of 'upsize' (v): (⇒ conjugate)

upsizes

v 3rd person singular

upsizing

v pres p

upsized

v past

upsized

v past p

WordReference Random House Unabridged Dictionary of American English © 2026

up•size  (up′sīz′), v.i., v.t., -sized, -sizing. 

1. Business to increase in size, as by hiring additional employees;
   expand:
   to upsize a business.

• 1985–90

up•size  (up′sīz′), v.i., v.t., -sized, -siz•ing. 

1. Business to increase in size, as by hiring additional employees;
   expand:
   to upsize a business.

• 1985–90

Collins Concise English Dictionary © HarperCollins Publishers::

upsize / ˈʌpˌsaɪz/ verb

1. to increase the operating costs of (a company) by increasing the number of people it employs
2. (transitive) to increase the size of or produce a larger version of (something)
3. (intransitive) to move to a larger home

Etymology: 20th Century: modelled on downsize