Spousal Contribution Guidelines. You and your spouse must file a joint tax return to take advantage of IRS guidelines for spousal contributions. Under the IRS spousal IRA rules, both spouses can make contributions to their accounts even if only one has earned income.Spouses can also make contributions to each otherâs IRAs.ou and your spouse must file a joint tax return to take advantage of IRS guidelines for spousal contributions. Under the IRS spousal IRA rules, both spouses can make contributions to their accounts even if only one has earned income. Spouses can also make contributions to each otherâs IRAs.
sigmet SIGMET, or Significant Meteorological Information, is a weather advisory that contains meteorological information concerning the safety of all aircraft. There are two types of SIGMETs, convective and non-convective.
sift. 1  to separate and retain the coarse parts of (flour, ashes, etc.) with a sieve. 2  to scatter or sprinkle through or by means of a sieve: to sift sugar onto cake. 3  to separate by or as if by a sieve. 4  to examine closely: The detectives are still sifting the evidence. 5  to question closely. 6  to sift something.