Definition of "MOD"

(UK politics) Initialism of Ministry of Defence; also MoD.  examples

(military, by extension) Initialism of ministry of defense. (not retricted to the British War Ministry)

(underwater diving) Initialism of maximum operating depth.  examples

(Internet slang) Initialism of method of delivery.  quotations

(dentistry) Initialism of mesio-occlusal-distal.  examples