1. Done or occurring in an instant, or without any perceptible duration
of time; as, the passage of electricity appears to be instantaneous.
His reason saw With instantaneous view, the truth of things.
Thomson.
2. At or during a given instant; as, instantaneous acceleration,
velocity, etc.
Instantaneous center of rotation (Kinematics), in a plane or in a plane
figure which has motions both of translation and of rotation in the
plane, is the point which for the instant is at rest. -- Instantaneous
axis of rotation (Kinematics), in a body which has motions both of
translation and rotation, is a line, which is supposed to be rigidly
united with the body, and which for the instant is at rest. The motion
of the body is for the instant simply that of rotation about the
instantaneous axis.
-- In`stan*ta"ne*ous*ly, adv. -- In`stan*ta"ne*ous*ness, n.
||In*stan"ter (?), adv. [L., vehemently, earnestly. See Instant, n. &
||a.] Immediately; instantly; at once; as, he left instanter.
||
In"stant*ly (?), adv. 1. Without the least delay or interval; at once;
immediately. Macaulay.
2. With urgency or importunity; earnestly; pressingly. "They besought
him instantly." Luke vii. 4.
Syn. -- Directly; immediately; at once. See Directly.
In*star" (?), v. t. To stud as with stars. [R.] "A golden throne
instarred with gems." J. Barlow.
In*state" (?), v. t. [imp. & p. p. Instated; p. pr. & vb. n.
Instating.] To set, place, or establish, as in a rank, office, or
condition; to install; to invest; as, to instate a person in greatness
or in favor. Shak.
In*stau"rate (?), v. t. [imp. & p. p. Instaurated (?); p. pr. & vb. n.
Instaurating (?).] [L. instauratus, p. p. of instaurare to renew. See
1st In-, and Store.] To renew or renovate. [R.]
In`stau*ra"tion (?), n. [L. instauratio: cf. F. instauration.]
Restoration after decay, lapse, or dilapidation; renewal; repair;
renovation; renaissance.
Some great catastrophe or . . . instauration.
T. Burnet.
In"stau*ra`tor (?), n. [L.: cf. F. instaurateur.] One who renews or
restores to a former condition. [R.] Dr. H. More.
In*staure" (?), v. t. [See Instaurate.] To renew or renovate; to
instaurate. [Obs.] Marston.