WordNet (r) 3.0 (2006):

pull back
    v 1: pull back or move away or backward; "The enemy withdrew";
         "The limo pulled away from the curb" [syn: withdraw,
         retreat, pull away, draw back, recede, pull back,
         retire, move back] [ant: advance, go on, march
         on, move on, pass on, progress]
    2: use a surgical instrument to hold open (the edges of a wound
       or an organ) [syn: retract, pull back, draw back]
    3: move to a rearward position; pull towards the back; "Pull
       back your arms!"
    4: stretch back a bowstring (on an archer's bow); "The archers
       were drawing their bows" [syn: pull back, draw]
    5: make a retreat from an earlier commitment or activity; "We'll
       have to crawfish out from meeting with him"; "He backed out
       of his earlier promise"; "The aggressive investment company
       pulled in its horns" [syn: retreat, pull back, back
       out, back away, crawfish, crawfish out, pull in one's
       horns, withdraw]