The phrase "a serious application" is correct and usable in written English.
It can be used when referring to an application that is earnest, significant, or intended for a serious purpose, such as a job application or a software application.
Example: "Submitting a serious application for the scholarship requires careful attention to detail and a well-crafted personal statement."
Alternatives: "a formal application" or "an earnest application".
The classes are on a pay-as-you-go structure, but require admission through a serious application process.
Mr Sewell's online petition is still running, but he believes it would take the involvement of big business before a serious application for an England TLD will be made.
He wanted it to be large enough that it could run a serious application, be that search or any other number of things that the developers were going to create.
So, for all of these reasons we took part of Snapchat, which has been used for absolutely childish, playful nature, and found a serious application for it.
Many love "Dancing Spirit" — it's a little too schematic for my taste — but it's a poetically serious application of different ingredients of African and African-American dance; its whole idiom has a kind of unshowy lyricism that opens a window of fresh air for Ailey.
A trail of failed startups have tried to tackle the problem with a fairly serious application of technology, including: Riya (now focused on ecommerce via Like.com), Ookles (never launched), and Polar Rose (in private beta for nearly a year), among others.
There was no indication in these files that these students' conduct warranted use of the Taser instead of a less serious application of force. .
We both were in a situation that required serious application.
But a satellite-navigation system is a serious, practical application.
He belonged to the true Keynesian tradition of serious application to study combined with thorough enjoyment of the good things in life.
Perhaps the first serious application of the tools we are studying in this entry comes from this period.
