The phrase "weighty idea" is correct and usable in written English.
It can be used to describe an idea that is significant, important, or carries a lot of meaning.
Example: "The philosopher presented a weighty idea that challenged our understanding of morality."
Alternatives: "significant concept" or "important notion."
Ed may have struggled with the weighty ideas unfolding onstage, but then so do many adult audience members.
I pondered such weighty ideas recently as I stood on East 17th Street, just west of Union Square Park.
While the conference at Davos may be best known for its discussions of weighty ideas, sometimes this Swiss town is the setting for deal making.
You have to put guts into the quest and you have to bare some of your soul in the process and if you can bring a few weighty ideas to the table, all the better.
From such is-it-art oddities it was only a short step to the next new interesting thing, Conceptualism, which, at its most reductive, consisted of weighty ideas typed out on thin sheets of paper.
It's a light proposal but there are weighty ideas behind it, not least that the cake is emblematic of a long gone, or slowly crumbled, era given that it was invented to celebrate the marriage of Queen Victoria's granddaughter to Prince Louis of Battenburg in 1884.
Rabbi Sacks's 30-minute keynote address, packed with pithy lines and weighty ideas, was both an ode to the Rebbe and a powerful primer on Jewish leadership.
This is all the more astonishing because Harburg had very weighty political ideas in mind.
The basketlike pieces looked lighter than air, but with their semiabstract images of half-built cities, viscera and bombs, they were weighty with ideas.
We are also disgusted by lobbying groups that knowingly leverage millions of dollars into false and misleading communications campaigns, which destroy the possibility of having a thoughtful, genuine debate about weighty policy ideas.
