say it: teer
tier is a noun meaning "a relative position or degree of value in a graded group". It carries 5 recorded senses.
any one of two or more competitors who tie one another
one of two or more layers one atop another
“tier upon tier of huge casks”
“a three-tier wedding cake”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for tier come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.