A wave that forms over a submerged offshore reef or rock, sometimes breaking heavily and producing a dangerous stretch of broken water.
- ‘Evans and his crew returned victorious from the 1928-29 Surfboat Championships and set off to tackle the Bombora now breaking massively out to sea off the surf club.’
- ‘Just a few metres off the point there is a bombora that comes up from more than 20 metres to less than 4 metres.’
- ‘To the south-east, just off the headland, there is a dangerous bombora at times, an area where broken waves can suddenly erupt.’
- ‘There we met up with a Naval boat which led us out through the huge swell generated by a bombora.’
- ‘There was a huge bombora breaking to our left, and huge seas crashing on the rocks around the cliffs to our right.’
1930s: from an Aboriginal word, perhaps Dharuk bumbora.