Definition of express:
(adj) :
moving or operating quickly, as a train not making local stops;
Specific or
precise
"I gave him express instructions not to begin until I arrived, but he ignored me."
(n) :
a mode of transportation, often a train, that travels quickly or directly
"I took the express into town."
(v) :
to convey meaning; to
excrete or cause to excrete, especially said of
milk
"words cannot express the love I feel for him."