weighty

US /ˈweɪ.t̬i/
UK /ˈweɪ.t̬i/
"weighty" picture
1.

having great weight; heavy

:
•
The box was too weighty for one person to lift.
•
He carried a weighty briefcase full of documents.
:
heavymassivebulkyponderoushefty
2.

of great importance or seriousness

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The committee discussed the most weighty issues facing the nation.
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His words carried a weighty significance.
:
importantsignificantseriousmomentousconsequentialgraveprofoundcriticalcrucialpivotal