The calculation of a curve or other line that most closely approximates a set of data points or measurements. See also regression analysis.
1. A small and often standardized accessory to a larger system.
2. Trying on clothes to see whether they fit; SYN. try-on, trying on.

ETYM French installation, Late Lat. installatio: cf. Italian installazione. Related to Install.
The act of installing something (as equipment); SYN. installing, installment.