English Reference
adjective

evolutionary

adj.
US /ˌɛvəˈɫuʃəˌnɛɹi/ UK /ɪvəlˈuːʃənəɹi/ evo·lu·tion·ary

  1. 01 B2 Upper Intermediate Academic Science

    relating to the way living things change and develop over millions of years.

    relating to the biological theory of evolution and the genetic changes in populations over generations.

    Simple

    Scientists study the evolutionary history of birds to see how they are related to dinosaurs.

    In context

    The discovery of the fossil provided critical evidence regarding the evolutionary transition from aquatic to terrestrial life forms.

    Usage

    Usually placed before the noun.

  2. 02 C1 Advanced AcademicFormal

    relating to a slow and steady change in an idea, a business, or a system.

    characterised by or relating to a process of gradual, incremental development rather than sudden or revolutionary change.

    Simple

    The company's success was due to evolutionary changes in its technology over ten years.

    In context

    The senator argued for an evolutionary approach to policy reform, preferring steady adjustments over a radical overhaul of the existing system.

    Usage

    Often contrasted with 'revolutionary'.

Usage evolutionary history · appreciation evolutionary · evolutionary challenge

Indigenous Peruvians carry exceptionally high numbers of a starch-digestion gene, likely because people with more copies gained an evolutionary advantage once potatoes became a staple food.

ScienceDaily· 10 Aug 2026

But after those early beginnings, major evolutionary milestones came very slowly.

The Guardian· 11 Aug 2026

From evolution + -ary.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level C1 · Advanced
Frequency Frequent
Updated