adjective, weight·i·er, weight·i·est.

having considerable weight; heavy; ponderous: a weighty bundle.
burdensome or troublesome: the weightier cares of sovereignty.
important or momentous: weighty negotiations.
having or exerting influence, power, etc.; influential: a weighty merchant of Boston.

Origin of weighty

First recorded in 1480–90; see origin at weight, -y1
Related formsweight·i·ly, adverbweight·i·ness, nounun·weight·y, adjective

Synonyms for weighty

Antonyms for weighty

1, 3. light. 3. unimportant.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for weightiness

Historical Examples of weightiness

British Dictionary definitions for weightiness


adjective weightier or weightiest

having great weight
important or momentous
causing anxiety or worry
Derived Formsweightily, adverbweightiness, noun
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 weightiness



"important, serious, grave," late 15c., from weight + -y (2).

Online Etymology Dictionary, © 2010 Douglas Harper