The phrase "a meaningful portion" is correct and usable in written English.
It can be used to refer to a significant or substantial part of something, often in discussions about data, content, or contributions.
Example: "The report highlighted a meaningful portion of the data that indicated a trend in consumer behavior."
Alternatives: "a significant part" or "a substantial segment".
Let's also require that CEOs hold a meaningful portion of their company-awarded equity into retirement.
GEORAD and OLTARIS interests are in the study of long term effects (i.e. a meaningful portion of solar cycle).
"A meaningful portion of the losses will flow to the global reinsurance industry," said Kenji Kawada, senior analyst for Moody's Japan K.K.
But it appears that workers continue to conduct at least a meaningful portion of their work on instant messaging or similar digital collaboration tools.
Mr. Ferry says the spending for the Disney media campaign is "a low-seven-figure kind of partnership in Year 1" representing "a meaningful portion of our business".
It's a long road from that conclusion to an argument that variations in cosmic rays can explain a meaningful portion of recent climate change.
"There are only a few major players who enjoy a meaningful share, with the remaining portion of the market, which is quite significant, distributed among hundreds of smaller companies.
Pacific League play is little more than a week away and there's nothing the Hoover High football team would like more than to get a win going into the truly meaningful portion of its season, if for no other reason than a simple morale boost.
Or at least the whole meaningful portion of the Copa.
Third, the general non-formalisability of complex systems should not prevent us from using formal tools whenever useful, such as in proving or ensuring properties of limited but meaningful portions of a system.
Once these boundaries are located, the computer can now extract only the meaningful portions of the iris.
