Zionist does have a specific meaning. It means you think the Jewish people have a god-given right to the Palestinian land, and that other creeds and ethnicities should be second class within the Jewish state in Palestine.
A non-zionist Israel would be one where all peoples had the same right, e.g.
"It means you think the Jewish people have a god-given right to the Palestinian land"
It was never actually Palastinian land. It was Jewish land, then Roman land, then Ottoman land, then British land, then Jewish land after Palastinians attacked Israel and lost. At no point were the Palastinians ever a sovereign country and in fact they incredibly foolishly rejected the UN offer for one.
"other creeds and ethnicities should be second class "
Approximately 2.5 to 2.6 million non-Jews live in Israel, comprising about 25% to 26% of the country's total population. This is compared to less than 1% of the population of Gaza being non-muslim.
There are more Muslims living happily in Israel than Jews in all Muslim countries combined.
More specifically there are 0 Jews living in areas under control of the Palestinian Authority, or in Lebanon, Syria, Egypt, Jordan, and Yemen.