What is the meaning of Interpolation?

An abrupt change in elements, with continuation of the first idea.

The process of estimating the value of a function at a point from its values at nearby points.

The process of including and processing externally-fetched data in a document or program; see interpolate.

That which is introduced or inserted; in contexts of content analysis of centuries-old texts, especially something foreign or spurious.

The use of a melody from a previously recorded song, but recreated rather than sampled from that recording.

interpolation

Source: wiktionary.org