The spelling of the word "most purcha" is likely incorrect as it does not make sense in the English language. However, based on the pronunciation of this phrase, it can be assumed that the intended word is "most purchase". In IPA phonetic transcription, this would be transcribed as /moʊst ˈpərtʃəs/, with the stress on the first syllable of "purchase". This word refers to the item(s) that have been bought more than any other items.
"Most purcha" does not appear to be a widely recognized or established term in the English language or within dictionary references. Thus, it does not have a specific dictionary definition. It is possible that it may be a typographical error or an incomplete phrase, and without further context or clarification, it is challenging to provide a precise meaning or definition for this term. It is advisable to review the intended word or phrase for accuracy to receive an appropriate definition.