An advance grant by the Lok Sabha that lets the government meet expenditure for a short part of the financial year before the full Budget is passed.
The Article 116 basis and the expenditure-only nature distinguish a vote on account from an interim Budget in objective questions.
A vote on account covers only expenditure for a short period; an interim Budget can present the full picture (receipts and expenditure) but is a convention, not a separate constitutional category.
Article 116 advance grant for expenditure (usually two months) until the full Budget is passed.