HM

The two-character ISO 3166 country code for Heard Island and McDonald Islands. Bloomberg Financial Dictionary

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HM UK US adjective [before noun]

► GOVERNMENT ABBREVIATION for Her (or His) Majesty's: belonging to or being a part of the government of the UK: »

HM Inspector of Taxes

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HM Treasury is planning a substantial tax increase on tobacco.

→ See also HMG(Cf. ↑HMG), HMRC(Cf. ↑HMRC)