The phrase "a meaningful expression" is correct and usable in written English.
It can be used when referring to a phrase, statement, or gesture that conveys significance or importance.
Example: "The poem was filled with a meaningful expression of love and loss that resonated with many readers."
Alternatives: "a significant phrase" or "a profound statement".
A similar argument may be given to show that ak is a meaningful expression even when k is negative, namely, a−k = 1/ak.
And is "national" mourning a meaningful expression of grief, or a purely symbolic political gesture?
A normalized spot intensity value of ≥120 was considered to be a meaningful expression level in Table S1.
Note that a meaningful expression for the flexibility matrix F can only be derived for the beam element without rigid-body modes (Scott et al. 2004).
The Roadmap--and the speed and scale of its early implementation--can be seen, in part, as a meaningful expression of NIH's very real concern that young scientists are receiving smaller and smaller pieces of the research pie.
How should we understand and approach art, if not in terms of the meaningful experiences that a subject might have of some art object, an art object which is itself a meaningful expression of the life of the artist (or artists) who created it?
Our acceptance of this phenomenon as commonplace, without any meaningful expression of discontent over being forced to sift from among the deluge of Hello Kitty content riddling major news outlets to find actual news -- now that's worth taking a moment to discuss.
A series of U.S.-led deep space missions that might included the Chinese as well as Canadians, Europeans and Japanese would be a truly meaningful expression of international cooperation and a significant antidote to centrifugal political forces back on Earth.
Unlike Quine, Frege treated all meaningful expressions on a par with respect to ontological commitment.
The left angular gyrus was a main hub in the networks for all meaningful expressions.
Presumably, the notion of application can be extended to other terms in a suitable way, so as to allow the normativity thesis to apply to all meaningful expressions.
