The telephone number for emergency services in the United Kingdom, Ireland, Hong Kong, Macau, Malaysia, Bangladesh, Burma, Bahrain, Qatar, the UAE, Kenya, Uganda, Zambia, Zimbabwe, Ghana, Sudan, South Sudan, Sierra Leone, Guyana, Antigua and Barbuda, Saint Lucia, Saint Vincent, Dominica, Kiribati, Samoa, the Solomon Islands, and the Seychelles.

(UK, Ireland, HK, Singapore, colloquial, metonymically) Emergency services; emergency service personnel.

(physics) The radioactive isotope of strontium, ⁹⁰₃₈Sr, that is present in the fallout from nuclear explosions and, being chemically similar to calcium, is accumulated in the bones

The decade beginning in '90 and ending in '99 of a century. / Temperatures from 90 to 99 degrees.

(US Army, US Air Force and US Navy, derogatory, slang) Newly-commissioned graduate of three-month Officer Candidate School (Army, Air Force), Midshipman School (Navy), or Direct Commissioning program.

An ISDN connection protocol somewhat similar to TCP.

Of telephone numbers dialed in North America, having an additional charge assessed to the caller, part of which is returned to the owner of the number.

plural of 900 number

(Canada, US) A telephone number for which an extra charge is assessed, part of which is returned to the owner of the number.

Alternative spelling of ninth grade