1existing, happening, or done at the same time:there are three concurrent art fairs around the city
(of two or more prison sentences) to be served at the same time:he received concurrent sentences of two years' imprisonment for each of his two convictions [postpositive]:she was given nine months concurrent for each offence
Mathematics (of three or more lines) meeting at or tending towards one point.
2agreeing or consistent.
late Middle English: from Latin concurrent- 'running together, meeting', from the verb concurrere(see concur)
concurrent in other Oxford dictionaries
Definition of concurrent in the US English dictionary