A military address is a way of addressing members of the armed forces. It typically consists of a rank, such as 'SIR, ' followed by the last name of the individual being addressed. In this case, the crossword solution for the term 'military address' is 'SIR, ' which is an abbreviation for the rank of 'SIR.' This rank is typically used to address officers in the British Armed Forces, but is also used in other countries.