to fill to excess; overcrowd or overburden; clog: The subway entrance was so congested that no one could move.
2.
Pathology. to cause an unnatural accumulation of blood or other fluid in (a body part or blood vessel): The cold congested her sinuses.
3.
Obsolete. to heap together.
verb (used without object)
4.
to become congested: His throat congested with phlegm.
Origin: 1530–40; < Latincongestus (past participle of congerere; see congeries), equivalent to con-con- + ges- (variant stem of gerere) + -tus past participle suffix
1538, "to bring together" (trans.), from L. congestus, pp. of congerere "to bring together, pile up," from com- "together" + gerere "to carry, perform." Medical sense of "unnatural accumulation" (1758) led to transferred (intrans.) sense of "overcrowd" (1859).
congest con·gest (kən-jěst') v.con·gest·ed, con·gest·ing, con·gests To cause the accumulation of excessive blood or tissue fluid in a vessel or an organ.