D defs.my
Entry 2 senses Webster, 1913

buildup

· build·up · IPA /ˈbɪldʌp/
01 n. the act of building up an accumulation.
  1. 1.
    the act of building up an accumulation.
  2. 2.
    the events, such as advertising or publicity, causing increased interest in some coming event.
Syn. build-up.