H.M.

1. Her Majesty.

2. His Majesty.

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h'm «huhm», interjection.

hem; hum.

hm.,

hectometer or hectometers.

H.M.,

1. Her Majesty.

2. His Majesty.

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HM [HM] (BrE) (also H.M. US, BrE) abbreviation

Her/His Majesty('s)

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HM the Queen

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HM Customs