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substantially

C1
Fairly common

Pronunciation

UK

  • /səbstˈænʃəlˌi/

US

  • /səbˈstænʃəli/

Meanings

Adverb

  1. to a considerable degree or extent

  2. in the main or for practical purposes; essentially

Beyond the definition

Imagine building with LEGO bricks. Adding just one tiny piece does not change your creation in a big way. But adding a whole new wing or rebuilding the base does. To do something "substantially" means to do it to a large degree or in a way that makes a real, clear difference.

You might say a construction project is "substantially complete" when most of the work is done, even if a few small details remain. Or you might say heavy rain has "substantially increased" the water level in a lake. It is more than a small change; it is something people can clearly notice. In legal and professional settings, it can also mean that the main requirements have been met.

Examples

  1. 1

    Housing prices

    House prices are substantially higher in the city center.

  2. 2

    Service improvement

    The new system cut waiting times substantially.

  3. 3

    Medical recovery

    Her condition improved substantially after a few weeks of treatment.

  4. 4

    Version comparison

    The second version is substantially different from the first one.

More examples
  1. 5

    Same meaning

    Although the wording changed, the meaning stayed substantially the same.

    • Phrasesubstantially the same

      almost the same in the important ways

  2. 6

    Resource demand

    The factory will need substantially more water if production expands.

  3. 7

    Ticket sales

    Substantially all of the tickets were sold before noon.

    • Phrasesubstantially all

      almost all

See also

Similar

Shades of meaning

Contrast

Do not confuse

  • substantively

Used with (collocations)

  • substantially increase
  • substantially reduce
  • substantially higher
  • substantially different

Word family

Explore

  • degree
  • statistical significance

Forms and spellings

1 form open this card.

Main spelling

  • substantiallyadverb