Definition of trade down or up in English:

trade down (or up)

Sell something in order to buy something similar but less (or more) expensive: homeowners who want to trade up
More example sentences
  • This is fine for people who want to sell up and trade down in the market, but is frustrating for home owners who want to move up the housing ladder.
  • First-time buyers were drawn by the two and three-bedroom townhouses while many of the larger three-beds were sold to couples trading up.
  • Fancy selling your home and trading up to a larger, plusher pad in the near future?
See parent entry: trade

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Pronunciation: ˈdeɪktɪk
adjective
denoting a word whose meaning depends on context...