NOUN (1)

1. an epidemic that is geographically widespread; occurring throughout a region or even throughout the world;


ADJECTIVE (2)

1. epidemic over a wide geographical area;
- Example: "a pandemic outbreak of malaria"

2. existing everywhere;
- Example: "pandemic fear of nuclear war"

The Collaborative International Dictionary of English v.0.48:

Pandemic \Pan*dem"ic\, a. [L. pandemus, Gr. ?, ?; pa^s, pa^n,
   all + ? the people: cf. F. pand['e]mique.]
   Affecting a whole people or a number of countries; everywhere
   epidemic. -- n. A pandemic disease. --Harvey.
   [1913 Webster]

WordNet (r) 3.0 (2006):

pandemic
    adj 1: epidemic over a wide geographical area; "a pandemic
           outbreak of malaria"
    2: existing everywhere; "pandemic fear of nuclear war"
    n 1: an epidemic that is geographically widespread; occurring
         throughout a region or even throughout the world

Moby Thesaurus II by Grady Ward, 1.0:

62 Moby Thesaurus words for "pandemic":
   ambulatory plague, average, besetting, black death, black plague,
   bubonic plague, catching, cellulocutaneous plague, common,
   communicable, contagious, current, defervescing plague, dominant,
   endemic, epidemial, epidemic, epiphytotic, epizootic,
   glandular plague, hemorrhagic plague, infectious, infective,
   inoculable, larval plague, murrain, normal, ordinary, pandemia,
   pest, pesthole, pestiferous, pestilence, pestilential, plague,
   plague spot, pneumonic plague, popular, predominant, predominating,
   premonitory plague, prevailing, prevalent, rampant, regnant,
   reigning, rife, routine, ruling, running, scourge,
   septicemic plague, siderating plague, sporadic, spreading,
   standard, stereotyped, taking, tuberculosis, usual, white plague,
   zymotic