The Collaborative International Dictionary of English v.0.48:

Stroller \Stroll"er\, n.
   One who strolls; a vagrant.
   [1913 Webster]

WordNet (r) 3.0 (2006):

stroller
    n 1: someone who walks at a leisurely pace [syn: saunterer,
         stroller, ambler]
    2: a small vehicle with four wheels in which a baby or child is
       pushed around [syn: baby buggy, baby carriage,
       carriage, perambulator, pram, stroller, go-cart,
       pushchair, pusher]