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. 2019

Examples from the Web for unballasted

Historical Examples of unballasted

  • The nightmare is evidently too much for these unballasted minds.

  • I hastened to prevent him; but he overthrew me with one hand, and the unballasted balloon ascended to two thousand yards.

  • 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