1. outlay The cost of a thing is whatever one surrenders or gives up for it, intentionally or unintentionally, or even unconsciously; expense is what is laid out by calculation or intention. We say, "he wo Synonyms: expense, cost, expenditure, outgo, outlay Antonyms: gain, proceeds, profit, receipt, return, income, product, profits, receipts, returns, ambiguous, implicit, indefinite, uncertain, doubtful, implied, indeterminate, vague