ˌi:vəˈlu:ʃən n. 1
gradual development,
esp.
from a
simple to a
more complex form. 2 a process by
which species develop from earlier forms, as an
explanation of
their origins. 3
the appearance or
presentation of events etc. in
due succession (the evolution of the plot). 4 a
change in the
disposition of troops or ships. 5 the giving
off or evolving of
gas,
heat, etc. 6 an
opening out. 7 the unfolding of a
curve. 8
Math. the
extraction of a root from
any given power (cf. INVOLUTION). øøevolutional adj. evolutionally adv. evolutionary adj. evolutionarily adv. [L evolutio unrolling (as EVOLVE)]