See under sennet1.
any of several small barracudas, as Sphyraena borealis (northern sennet), ranging along the eastern coast of North and Central America.
Origin of sennet1
First recorded in 1665–75; origin uncertain
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a fanfare: used as a stage direction in Elizabethan drama
Word Origin for sennet
C16: probably variant of signet (meaning ``a sign'')
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012