baa

Short definition from Wiktionary

Noun

1. 1
   The characteristic cry or bleating of a sheep.
2. 2
   The letter ب in the Arabic script.

Interjection

1. 1
   The characteristic cry of a sheep.

Verb

1. 1
   To make the characteristic cry of a sheep.

Proper noun

1. 1
   Initialism of Broad Agency Announcement.
2. 2
   Initialism of Business Associate Agreement: under HIPAA, a contract to protect personal health information.