say it: AHR-bur
arbor is a noun meaning "tree (as opposed to shrub)". It carries 3 recorded senses.
tree (as opposed to shrub)
any of various rotating shafts that serve as axes for larger rotating parts
a framework that supports climbing plants
“the arbor provided a shady resting place in the park”
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 arbor 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.