'fall back' definitions:

Definition of 'fall back'

(from WordNet)
verb
Fall backwards and down
verb
Hang (back) or fall (behind) in movement, progress, development, etc. [syn: lag, dawdle, fall back, fall behind]
verb
Move back and away from; "The enemy fell back"
verb
Retreat [syn: fall back, lose, drop off, fall behind, recede] [ant: advance, gain, gain ground, get ahead, make headway, pull ahead, win]
verb
Have recourse to; "The government resorted to rationing meat" [syn: fall back, resort, recur]
verb
Go back to bad behavior; "Those who recidivate are often minor criminals" [syn: relapse, lapse, recidivate, regress, retrogress, fall back]

Synonyms of 'fall back'

From: Moby Thesaurus

Words containing 'fall back'