(informal) an exclamation of approval,
surprise, mild disapproval, emphasis, etc.
—Games Congress Gls (Approved 13.8.92), —Grad V Approved 1992 Glossary Upgrade, —HDA Tapes (Oakland Lectures) Approved Glossary (16.4.92), —NED Approved Glossary, —NVRD Approved Glossary, —State of Man Congress Approved Gls (14.5.92)