at about

at about

Near or close to; approximately; around. Usually refers to a numerical value or point in time. We're planning to arrive at about noon. He was a huge man, standing at about seven feet tall. The lottery this week is valued at about $200 million.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

at about

At approximately, as in We'll start at about nine. This phrase, most often used with respect to time (as at about four o'clock), is sometimes criticized for being redundant. Although one of the two words sometimes can be omitted without changing the meaning-for example, About four o'clock is when most guests will arrive-in other instances both are needed, as in This stock is now selling at about its original offering price. [Early 1800s]
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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