The phrase "a dramatic signal" is correct and usable in written English.
It can be used when referring to a strong or significant indication of something, often in a context related to emotions, events, or changes.
Example: "The sudden drop in temperature served as a dramatic signal that winter was approaching."
Alternatives: "a powerful indication" or "a striking sign".
While not formally amounting to a full expulsion, the move nonetheless sends a dramatic signal: after a year-long dispute triggered by the revelations of NSA whistleblower Edward Snowden, Merkel seems to have finally run out of patience with Washington's failure to explain itself.
On Saturday, Pope Benedict XVI offered a dramatic signal of rapprochement between the Vatican and the society when he revoked the excommunication of four of its bishops, including one, Richard Williamson, who has made comments denying the Holocaust and speculating that the United States government orchestrated the Sept. 11 attacks.
That will be hard for many of his colleagues to swallow, but it would be a dramatic signal of change.Not just Mr Nice GuyIf Mr Cameron means what he says, he is also going to have to be bold in changing the way the party selects its parliamentary candidates.
To CBS Pentagon correspondent David Martin, the story was a dramatic signal that the allied troops were secretly migrating much farther west than anyone was expecting.
If Friday's bombings were carried out by Islamic State group supporters, it could be intended as a dramatic signal to al-Qaida, the group's rival — effectively a challenge over turf.
Extraction of cholesterol in T cells of young healthy subjects had a very dramatic signal-disrupting effect, while in T cells of healthy elderly subjects Lck, ERK1 and ERK2 phosphorylations were enhanced compared with the nontreated T cells.
Our novel dramatic signal amplification strategy, with a detection limit of 2.7 fM, showed about 2 3 orders of magnitude improvement in the sensitivity for thrombin detection compared to other universal enzyme-based electrochemical assay.
It was unheard of, a dramatic warning signal of British industry's distress.
The Federal Reserve is about to send the most dramatic signal yet of its resolve to fight inflation, many private economists predicted Monday on the eve of a meeting of central bank policy-makers.
Such dramatic signal enhancement on the GNP-SiNR-based LFSB is mostly due to the large surface area of the SiNRs where numerous GNPs were loaded.
Probe sequences more than 400 bp from the 3' end of the human gene ortholog showed a dramatic attenuation of signal intensity with the best hybridization signals occurring closest to the 3' end of the gene.
