in·ter·po·late [ in túrpə làyt ](past and past participlein·ter·po·lat·ed, present participlein·ter·po·lat·ing, 3rd person present singularin·ter·po·lates)
verb
Definition:
1. transitive verb insert something into something else: to add one thing, often an unnecessary item, between the existing parts of something else
2. transitive verb alter text: to alter or deliberately falsify a text by adding a comment or extra words to it
3. transitive and intransitive verb interrupt by saying something: to say something that interrupts what somebody else is saying
4. transitive verb mathematics estimate value of mathematical function: to estimate the value of a mathematical function that lies between known values, often by means of a graph
[Early 17th century. < Latin interpolat-, past participle of interpolare "polish up"]