English Reference
adjective

weighty

adj.
US /ˈweɪˌti/ UK /wˈeɪti/ weighty

  1. 01 B2 Upper Intermediate

    having a lot of weight; heavy and difficult to lift.

    having considerable physical weight or mass.

    Simple

    He struggled to carry the weighty boxes up the three flights of stairs.

    In context

    The delivery driver required a trolley to move the weighty crates of machinery from the loading dock to the warehouse floor.

    lightweightless
  2. 02 C1 Advanced FormalAcademic

    very important and serious; not something to be treated lightly.

    possessing great significance, influence, or importance; not trivial.

    Simple

    The committee has a weighty decision to make about the school's future.

    In context

    The prime minister addressed several weighty matters of national security during the emergency cabinet meeting this afternoon.

  3. 03 C1 Advanced LiteraryFormal

    difficult to deal with or causing a lot of worry.

    burdensome, rigorous, or severe in nature; often used to describe responsibilities or consequences.

    Simple

    She felt the weighty responsibility of looking after her younger siblings.

    In context

    The judge acknowledged the weighty burden of proof required in such a complex criminal litigation.

India's top judges often make news for their rulings or pronunciations on weighty matters of law.

BBC News· 18 Aug 2026

From Middle English weighti, weghti, wighti, equivalent to weight + -y. Cognate with Scots weichty, wechty, wichty, Saterland Frisian wichtich, West Frisian wichtich, Dutch wichtig, gewichtig, German wichtig, Danish vigtig, Swedish viktig. Compare typologically Russian ве́ский (véskij), весо́мый (vesómyj) (< вес (ves)). Also compare the same meaning development from cognate (by borrowing) Polish waga (< ... < Proto-Germanic *wēgō): ważny (whence Russian ва́жный (vážnyj)).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin Middle English weighti
Level C1 · Advanced
Frequency Occasional
Updated