concentrate at

concentrate at (some place)

1. To have people gather in a particular place or area. In this usage, a noun or pronoun is used between "concentrate" and "at." Concentrate all the guests at the entrance to the venue for now—I don't want them to see the wedding party just yet.
2. To gather in a particular place or area in large numbers. Most of the guests are concentrated at the buffet right now. I had a hard time getting down the hallway because so many students were concentrated at the door to the gym.
See also: concentrate

concentrate someone or something at something

to cause people or things to gather at a place; to cause people or things to convene or converge at a place. You shouldn't concentrate all the guards at one entrance. The general concentrated all the big guns at the entrance to the valley.
See also: concentrate
References in periodicals archive ?
The Company plans to process low-carbon concentrate at the debottlenecked Amursk POX facility, but retains the flexibility to direct this material to offtake.
Securing offtake for Kyzyl concentrate at good terms is an important milestone for the project, said Vitaly Nesis, Group CEO of Polymetal.
Nine-month testing of pipe made with the new concentrate at pressures exceeding 1250 psi at 73 F for water pipe and 140 F for gas reportedly show that the 45% concentrate performs as well as the standard 35% formulation on the market.
Two-mil-thick LDPE film samples containing this concentrate at letdown ratios up to 12:1 reportedly have met the requirements of MVSS 302.