/
ˌɪnst(ə)nˈteɪnɪəs/
adj.
- occurring or done instantly.
- Physics existing or measured at a particular instant.
Derivative
- instantaneity n.
- instantaneously adv.
- instantaneousness n.
Etymology
C17: from med. L. instantaneus, from L. instant- (from instare ‘be at hand’).