What does evolutionarily mean?
'Evolutionarily' is an adverb meaning 'with respect to evolution' — the gradual process by which living things develop and diversify across generations through mechanisms like natural selection. It belongs chiefly to the vocabulary of biology and medicine, appearing most often before adjectives to frame a trait in evolutionary terms: a gene may be described as 'evolutionarily conserved' if it has remained largely unchanged across vast stretches of time, two species as 'evolutionarily related' if they share a common ancestor, or a behavior as 'evolutionarily advantageous' if it improved survival or reproduction. The word signals a specific analytical lens: rather than asking what something does now, it asks how that feature came to be through long-term descent with modification. Because of its length and technical register, it rarely appears in casual speech, but within scientific literature it is indispensable for expressing this comparative, historical perspective on living systems.
adverbIn a manner relating to evolution, especially the gradual development of organisms over successive generations through natural selection; also, in a way that develops gradually or incrementally.
- With respect to biological evolution, especially descent with modification via natural selection
- With respect to any gradual, incremental process of development or change
"The eye is often cited as evolutionarily complex, yet it arose independently many times across the animal kingdom."
"Humans are evolutionarily adapted to conserve energy, which helps explain our attraction to calorie-dense foods."
"The company chose to grow evolutionarily rather than pursue a radical restructure."
Biologists use 'evolutionarily conserved' as a badge of honor for genes so essential that hundreds of millions of years of natural selection haven't dared to change them.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of evolutionarily
The word derives from 'evolution', which entered English from Latin 'evolutio', meaning 'an unrolling' (from 'evolvere', 'to roll out'), a term originally applied to the unrolling of a scroll before being adopted in 19th-century science for the development of species. The adjective 'evolutionary' formed from that noun, and 'evolutionarily' is its standard adverbial form, created by adding '-ly'. Its scientific usage rose to prominence following Charles Darwin's publication of On the Origin of Species in 1859. Cognates include 'devolve' and 'involve', all built on the same Latin root 'volvere', meaning 'to roll'.
Related word forms
How evolutionarily is actually used
Primarily a formal, technical term used in biology and the life sciences, where it typically modifies adjectives such as 'conserved', 'related', 'ancient', 'novel', or 'stable'. Outside scientific writing it is rare; general contexts usually favor 'in evolutionary terms' or 'over evolutionary time'. The extended sense describing non-biological gradual change exists but is uncommon.
Easily confused with evolutionarily
'Revolutionarily' relates to revolutionary change (sudden, drastic transformation), whereas 'evolutionarily' relates to evolutionary development (gradual change over time).