In accounting this means to defer or to delay recognizing certain revenues or expenses on the income statement until a later, more appropriate time. Revenues are deferred to a balance sheet liability account until they are earned in a later period. When the revenues are earned they will be moved from the balance sheet account to revenues on the income statement.
Expenses are deferred to a balance sheet asset account until the expenses are used up, expired, or matched with revenues. At that time they will be moved to an expense on the income statement.