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weighty

Weighty things are either very heavy or extremely important and worrisome. Putting your weighty cat on a diet might be a weighty issue that nags at you.

If your luggage is too weighty, you'll have to pay an extra fee at the airport. And if you've got a mind full of weighty problems, you won't be able to fall asleep on your long flight. Sometimes this adjective is also used to mean "influential," like the weighty influence your SAT scores might have on your chances of being accepted at a competitive college.

Definitions of weighty
  1. adjective
    having relatively great weight; heavy
    “a weighty load”
    “a weighty package”
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    Antonyms:
    weightless
    having little or no weight or apparent gravitational pull; light
  2. adjective
    of great gravity or crucial import; requiring serious thought
    “the weighty matters to be discussed at the peace conference”
    synonyms: grave, grievous, heavy
    important, of import
    of great significance or value
  3. adjective
    weighing heavily on the spirit; causing anxiety or worry
    weighty problems”
    Synonyms:
    heavy
    marked by great psychological weight; weighted down especially with sadness or troubles or weariness
  4. adjective
    powerfully persuasive
    “a weighty argument”
    synonyms: cogent, telling
    persuasive
    intended or having the power to induce action or belief
  5. adjective
    excessively large
    “a weighty man”
    synonyms: corpulent, obese, rotund
    fat
    having an (over)abundance of flesh
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