say it: SAHY-dahrm
sidearm is an adjective and adverb meaning "(of pitches) made with the arm moving parallel to the ground". It carries 2 recorded senses.
(of pitches) made with the arm moving parallel to the ground
“a sidearm pitch”
in a sidearm manner
“he prefers to throw sidearm”
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 sidearm 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.