Function: intransitive verb
Date: 1607
: RETREAT , RECEDE
– fall back on or fall back upon : to have recourse to <had to fall back on their reserves>
Function: intransitive verb
Date: 1607
: RETREAT , RECEDE
– fall back on or fall back upon : to have recourse to <had to fall back on their reserves>
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012