Definition of "go ahead"

go ahead

/ˌɡəʊ əˈhɛd/

verb
third-person singular simple present goes ahead, present participle going ahead, simple past went ahead, past participle gone ahead
1. To proceed with; to begin.
  Quotations
  In the meantime, strikes already planned for NR are to go ahead, despite an offer being put to RMT members in an electronic ballot that was due to close on December 12 (after this issue of RAIL went to press).
  2022 December 14, Mel Holley, “Network News: Strikes go on as RMT rejects RDG's "detrimental" offer”, in RAIL, number 972, page 8
2. (imperative) Used to grant permission for or to give endorsement of a suggestion or proposal.
  Quotations
  “Tom Sawyer, I want to ask you some questions.” “Go ahead,” he says, and I see Jim chirk up to listen.
  1894, Mark Twain, chapter 12, in Tom Sawyer Abroad
3. (procedure word, military) To send communication over the radio.