1. PBI - Noun
2. PBI - Proper noun
PBI
Initialism of Plant Breeding Institute - a founding unit of the John Innes Centre
(chemistry) Acronym of polybenzimidazole.
Initialism of poor bloody infantry - the infantry of the British Army
Source: en.wiktionary.orgThe court also asked the PBI authorities to submit the investigation report by March 23. Source: Internet