Merriam-Webster Collegiate Dictionary - vagabond

 I. adjective  Etymology: Middle English, from Anglo-French vacabund, from Late Latin vagabundus, from Latin vagari to wander  Date: 15th century  1. moving from place to place without a fixed home ; wandering  2.  a. of, relating to, or characteristic of a wanderer  b. leading an unsettled, irresponsible, or disreputable life  • ~ish adjective  II. noun  Date: 15th century one leading a ~ life; especially vagrant, tramp  • ~age noun  • ~ism noun  III. intransitive verb  Date: circa 1586 to wander in the manner of a ~ ; roam about