Function: noun
Date: 1934
: the length of time during which one (as an individual or a group) is able to concentrate or remain interested
Function: noun
Date: 1934
: the length of time during which one (as an individual or a group) is able to concentrate or remain interested
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012