Source : Webster's Revised Unabridged Dictionary (1913)

Bromide \Bro"mide\, n.
   A person who is conventional and commonplace in his habits of
   thought and conversation. [Slang] -- {Bro*mid"ic}, a. [Slang]

Bromide \Bromide\, or Bromid paper \Bromid, paper\ (Photog.)
   A sensitized paper coated with gelatin impregnated with
   bromide of silver, used in contact printing and in enlarging.

Bromide \Bro"mide\, n. (Chem.)
   A compound of bromine with a positive radical.

Source : WordNet®

bromide
     n 1: any of the salts of hydrobromic acid; used as a sedative
     2: a trite or obvious remark [syn: {platitude}, {cliche}, {banality},
         {commonplace}]
     3: a sedative in the form of sodium or potassium bromide