MAC
Also used as slang
View on the slang dictionary page →(chemistry) , the maximum concentration of a pollutant which is considered harmless to healthy adults during their working hours, assuming they breathe uncontaminated air at all other times.
When operating on customer MAC (C-MAC) and service MAC (S-MAC) addresses, PBB uses a new backbone MAC (B-MAC) address. The B-MAC address is added at the edge of the PBB network, that is administered by a carrier VPN or a carrier-of-carri…
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(US, _, military) , formerly, one of three former divisions of the US airforce, the others being SAC and TAC.
"MAC" means , formerly, one of three former divisions of the us airforce, the others being sac and tac. It is one of many casual words teens pick up from friends, social media, music or sport, and on its own it carries no particular warning. If you hear your teen use it, it is fair to ask what they mean by it in their friend group, since meanings drift quickly. Asking out of curiosity rather than alarm tends to keep the conversation open and useful.
"MAC" is informal English meaning , formerly, one of three former divisions of the us airforce, the others being sac and tac. It is mainly used in North American English. A more formal or neutral equivalent would be something like "" expressed in standard vocabulary. A common mistake is to assume "MAC" can replace its standard equivalent in every register; keep it for spoken or casual situations and use the formal form in writing. If you are a B2 or C1 learner, it is useful to recognise this word when you hear or read it, but think carefully about whether the situation really calls for it before using it yourself.
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(networking) : the portion of Ethernet, Wi-Fi 802.11 wireless, Bluetooth, FDDI, ATM, and Fibre Channel networks that controls which hardware devices have access to the media over which signals are sent.
When operating on customer MAC (C-MAC) and service MAC (S-MAC) addresses, PBB uses a new backbone MAC (B-MAC) address. The B-MAC address is added at the edge of the PBB network, that is administered by a carrier VPN or a carrier-of-carri…
“For other uses, see [Mac](https://en.wikipedia.org/wiki/Mac_(disambiguation) "Mac (disambiguation)").”
“For other uses, see [Mac OS (disambiguation)](https://en.wikipedia.org/wiki/Mac_OS_(disambiguation) "Mac OS (disambiguation)") and [Macos (school)](https://en.wikipedia.org/wiki/Macos_(school) "Macos (school)").”
“MAC is an acronym for _Make-Up Art Cosmetics_.”
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