the lecture went on for hours : LAST, continue, carry on, run on, proceed; endure, persist; take.
she went on about the sea : TALK AT LENGTH, ramble, rattle on, chatter, prattle, gabble, blether, blather, twitter; informal gab, yak, yabber, yatter; Brit. informal witter, rabbit, natter, waffle, chunter; N. Amer. informal run off at the mouth.
I'm not sure what went on : HAPPEN, take place, occur, transpire; N. Amer. informal go down; poetic/literary come to pass, betide; archaic hap.
2192; headword