The first of three Australian AIG Women's Open Champions to date, Dibnah triumphed in dramatic fashion at Lindrick in 1988.
Dibnah and Sally Little of the USA could not be separated through 72 holes, the pair finishing one ahead of the previous year's winner, Alison Nicholas, on a fascinating final day.
A sudden-death play-off was therefore required - the first in the Championship's history - and Dibnah birdied the second extra hole to take the title.
She came close to another AIG Women's Open win four years later, when she was beaten only by Patty Sheehan at Woburn in a Championship reduced to 54 holes due to a second-day washout.
Dibnah recorded 13 wins on the Ladies European Tour between 1986 and 1994, putting her inside the top 10 on the circuit's all-time list.