(of quantities) imprecise but fairly close to correct
"lasted approximately an hour"
"in just about a minute"
"he's about 30 years old"
"I've had about all I can stand"
"we meet about once a month"
"some forty people came"
"weighs around a hundred pounds"
"roughly $3,000"
"holds 3 gallons, more or less"
"20 or so people were at the party"
In a rough manner; without kindness, softness, or gentleness.
"The coach spoke to the rookie roughly, shouting harsh instructions instead of offering encouragement."
In plain English: Roughly means something is approximately correct but not exact.
"The meeting started roughly ten minutes later than expected."
Usage: Use roughly to describe actions performed in an abrupt or harsh way rather than with care. Avoid confusing it with approximately when you mean something is close but not exact.
This word is formed by adding the suffix "-ly" to "rough." It entered English as a straightforward combination of these two existing elements.