1. having relatively great weight; heavy

- a weighty load

- a weighty package

2. powerfully persuasive

- a weighty argument

Similar word(s): persuasive, cogent, telling

3. of great gravity or crucial import; requiring serious thought

- the weighty matters to be discussed at the peace conference

Similar word(s): important, grave, grievous, heavy

4. weighing heavily on the spirit; causing anxiety or worry

- weighty problems

Similar word(s): heavy

5. excessively fat

- a weighty man

Similar word(s): fat, corpulent, obese, rotund