We found one dictionary that defines the word upper tier:

General (1 matching dictionary)

1. upper-tier: Wordnik

▸ Words similar to upper tier ▸ Usage examples for upper tier ▸ Idioms related to upper tier ▸ Wikipedia articles (New!) ▸ Words that often appear near upper tier ▸ Rhymes of upper tier ▸ Invented words related to upper tier