The Collaborative International Dictionary of English v.0.48:

Overfull \O"ver*full"\, a. [AS. oferfull.]
   Too full; filled to overflowing; excessively full; surfeited.
   --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

overfull
    adj 1: exceeding demand; "a glutted market" [syn: glutted,
           overfull]

Moby Thesaurus II by Grady Ward, 1.0:

87 Moby Thesaurus words for "overfull":
   SRO, allayed, bloated, brimful, brimming, bulging, bursting,
   capacity, chock-full, choked, chuck-full, cloyed, congested,
   cram-full, crammed, crowded, disgusted, distended, drenched,
   engorged, excessively, extremely, farci, fed-up, filled,
   filled to overflowing, flush, full, full of, full to bursting,
   glutted, gorged, hyperemic, immensely, in spate, inordinately,
   jaded, jam-packed, jammed, over, overblown, overburdened,
   overcharged, overfed, overflowing, overfraught, overfreighted,
   overgorged, overladen, overloaded, overly, overmuch, oversaturated,
   overstocked, overstuffed, oversupplied, overweighted, packed,
   packed like sardines, plenary, plethoric, ready to burst, replete,
   round, running over, sated, satiated, satisfied, saturated,
   sick of, slaked, soaked, standing room only, stuffed, stuffed up,
   supercharged, supersaturated, surcharged, surfeited, swollen,
   tired of, too, topful, unduly, with a bellyful, with a snootful,
   with enough of