"This is certainly a fantastic occasion."
Translation:Dit is zeker een fantastische gelegenheid.
Thank you for answering. I don't doubt that "certainly" is the most common meaning for the adverb "zeker", but four different dictionaries tell me it also used similarly to "waarschijnlijk" (this one, for example: http://www.woorden.org/woord/zeker).
Example sentences that I've found:
"Jij komt zeker met de trein?"
"Hij komt zeker weer te laat."
So does it mean "certainly" or "probably" in these cases?
In the first case it indeed means 'probably' but that is because of the context. It is posed as a question, if it wasn't a question it would have the translation: "You will certainly come by train." In the second case it literally translate into: "He will come certainly again too late" but because it is a loose statement you can translate it into 'probably'. You can't really be certain he will be too late.