- deep and wide enough to provide passage to ships: a navigable channel.
- capable of being steered or guided, as a ship, aircraft, or missile.
Origin of navigable
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for unnavigable
At the same time there are numerous, but unnavigable rivers.My First Voyage to Southern Seas
Their violence makes them difficult to control, and they are unnavigable.Area Handbook for Albania
Eugene K. Keefe
From Vivi to Isangila, we must remember, the river is unnavigable.The World and Its People: Book VII
Anna B. Badlam
The rivers, known only at their mouths, seem to be unnavigable.
On account of the number of trunks of trees, it is unnavigable for large ships.A Woman's Journey Round the World
- wide, deep, or safe enough to be sailed on or througha navigable channel
- capable of being steered or controlleda navigable raft
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for unnavigable
mid-15c., from Old French navigable (14c.) or directly from Latin navigabilis, from navigat-, past participle stem of navigare (see navigation). Related: Navigability.
Online Etymology Dictionary, © 2010 Douglas Harper