number larger than one by which a combined standard measurement uncertainty is multiplied to obtain an expanded measurement uncertainty
NOTE A coverage factor is usually symbolized k (see also ISO/IEC Guide 98-3:2008, 2.3.6).
ANNOTATION (informative) [1 December 2014] Here "combined standard measurement uncertainty" can be replaced with "combined standard uncertainty" and "expanded measurement uncertainty" can be replaced with "expanded uncertainty" without ambiguity: "number larger than one by which a combined standard uncertainty is multiplied to obtain an expanded uncertainty".