verb
Etymology: steam (II) + up, adverb
transitive verb
1. : to cover with steam or vapor
his breath steamed up the window pane
2. : to supply with energy : give impetus to
a drive for bigger government spendings to steam up the economy — Kiplinger Washington Letter
3. : to make angry or excited : arouse
the injustice of the charges steamed him up
will find the neighbors much more steamed up over economic issues — Time
4. Britain : to feed (a female domestic animal) heavily especially before parturition in order to induce a heavy milk flow
intransitive verb
: to become covered with steam
his glasses steamed up as he came into the warm room