Definition
To act "weightily" means doing something in a serious, important, or ponderous manner. Imagine someone delivering a crucial speech with gravitas and solemnity; they are speaking weightily. It implies a sense of significance and importance. It's different from acting lightly or frivolously; it conveys a sense of responsibility. Essentially, it's like a judge handing down a serious verdict. It suggests that the matter at hand is not to be taken lightly.