The phrase "already massed" is correct and usable in written English.
It can be used to describe something that has been gathered or accumulated prior to a certain point in time.
Example: "The troops had already massed at the designated location before the dawn of the operation."
Alternatives: "previously gathered" or "already assembled".
Mr. Bethune sped to work, where he joined some board members already massed in front of a television in horror.
India and Pakistan have a total of a million troops already massed along their 1,800-mile 1,800-mile
Outside, the drug dealers had already massed, carrying machine guns, assault rifles and shotguns, selling cocaine and marijuana at the entrance.
More than that, it gives him a status outside golf's already massed ranks of true believers to rank with any of the new generation of sporting heroes.
Students were already massing Friday before Mr. Chirac spoke, obstructing roads and railways for a second day in a row.
Meanwhile, a fleet of lawyers is already massing, with new class-action suits being filed seemingly by the hour.
It describes both the risks of terror attacks on American forces inside Iraq if an invasion occurs and the danger of similar attacks on troops already massing in the region.
Already mass-produced stainless-steel pins offer the possibility of developing low-cost electroanalytical devices with a versatile disposition of the electrodes.
Mr. Ehrenberg suggested another advantage to hydrocarbon membranes: they are already mass produced.
It's reassuring to read that in 1965, when the Museum of Modern Art put up the first big show of what became then called Op Art, the Seventh Avenue garment industry had already mass produced knockoff prints from Bridget Riley and the like, and then worn by women attending the opening.
A lot of Lazada's efforts are first-moves for these regions — where smaller businesses may not have online channels already; mass consumers are just getting into the groove of buying goods online; and Amazon has yet to make its presence felt.
