What is the meaning of Jitter?

A nervous action; a tic.

A state of nervousness.

An abrupt and unwanted variation of one or more signal characteristics.

A random positioning of data points to avoid visual overlap.

To be nervous.

To position data points randomly to avoid visual overlap.

A program or routine that performs jitting; a just-in-time compiler.

jitter (abrupt and unwanted variation of signal characteristics)

Source: wiktionary.org