(weightier, weightiest)
1.
If you describe something such as an issue or a decision as ~, you mean that it is serious or important. (FORMAL)
Surely such ~ matters merit a higher level of debate?
= serious, important
ADJ: usu ADJ n
2.
You use ~ to describe something, especially a book, that is heavy or heavier than you would expect. (LITERARY)
Simon lifted a ~ volume from the shelf.
= hefty
ADJ