Wiktionary
vb. 1 (context transitive English) To stow or secure in a safe place. 2 (context intransitive English) To obtain passage (on a ship or similar vehicle) by secreting oneself inside before departure.
WordNet
v. hide aboard a ship or a plane to get free transportation; "The illegal immigrants stowed away on board the freighter"
Usage examples of "stow away".
It was indeed a long day, full and busy - the fore-hold to clear, the prisoners to stow away and guard (many of them privateer's men, a dangerous crew), three slow-witted heavy merchantmen to scurry after (all neutrals and all unwilling to heave-to.
When he'd been a juvvie and thought almost everything was impossible he'd had fantasies of coming down to the world-he'd stow away on a shuttle.
Dave continued busily to stow away grilled ham, while considering his position.
William, and you, and I, will first secure the boat and stow away the tents and gear.
The off-the-cuff decision to stow away on board one of Yama-Shita's wheelboats without asking even the most elementary questions about what he might find when he got to wherever they were going was a prime example.
Now, what I wish is, that the hinder part of the cabin, where you used to stow away your dried birds, should be made over to me.
He gives me his handkerchief with his bit of dinner in it and a tinder-box he had about him, which I stow away in my apron pocket, and I show the plantation a clean pair of heels, I can tell you, adding to my list of crimes that most heinous: escape from bondage.