- not fitted with or carrying ballast.
- not properly steadied or regulated.
Origin of unballasted
1635–45; un-1 + ballasted
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for unballasted
The nightmare is evidently too much for these unballasted minds.The Origins of Contemporary France, Volume 3 (of 6)
Hippolyte A. Taine
I hastened to prevent him; but he overthrew me with one hand, and the unballasted balloon ascended to two thousand yards.A Winter Amid the Ice
They were riding an unballasted track and using such speed as they dared to escape from a situation that had become perilous.Whispering Smith
Frank H. Spearman
The wind was fairly fresh and the weight of the unballasted Surprise did not stop the Viking.The Rival Campers Afloat
Ruel Perley Smith
The body loomed beside us like the rolling hull of an unballasted ship.Swept Out to Sea
W. Bertram Foster