Meaning of zillionth in English:

zillionth

ordinal number

informal
  • 1Used to emphasize that something has happened repeatedly many times.

    ‘for the zillionth time, it's not a big deal’
    ‘I had my zillionth trip to the hospital’
  • 2A tiny fraction of something.

    ‘a few zillionths of a percentage’

Pronunciation

zillionth

/ˈzɪljənθ/