the act or fact of culminating.

that in which anything culminates; the culminating position or stage; highest point; acme.

Astronomy . the position of a celestial body when it is on the meridian.

noun

beginning , commencement , opening , start

noun

acme , all the way , apex , apogee , blow off * , capper , climax , completion , consummation , critical mass , crown , crowning touch , finale , finish , height , limit , maximum , meridian , ne plus ultra , noon , payoff , peak , perfection , pinnacle , punch line * , summit , top , zenith , crest , fruition , materialization , realization , climacteric , end , vertex