In two figures having relative motion, one of the two curves which are the loci of the instantaneous center.
2
used to limit the instantaneous amplitude of a waveform (to clip off the peaks of a waveform) n a fast sailing ship used in former times n shears for cutting grass or shrubbery (often used in the plural) n scissors for cutting hair or finger nails (often used in the plural)
3
Happening at the same instant.
4
the instantaneous change of one quantity relative to another
