wanderlust

Short definition from Wiktionary

Noun

1. 1
   A strong impulse or longing to travel.
2. 2
   An impulse to cheat or seek out other romantic or sexual partners; a straying heart.
3. 3
   Alternative letter-case form of wanderlust.

Verb

1. 1
   To feel a strong impulse or longing to travel.
2. 2
   To roam or travel widely.