verb

• (transitive, formal) To befit, to suit.
  "[W]here therefore public diversions are tolerated, it behoves persons of distinction, with their power and example, to preside over them in such a manner as to check any thing that tends to the corruption of manners, or which is too mean or trivial for the entertainment of reasonable creatures."
• (transitive, formal) To be necessary for (someone).
  "Accordingly, Mr. Stryver inaugurated the Long Vacation with a formal proposal to take Miss Manette to Vauxhall Gardens; that failing, to Ranelagh; that unaccountably failing too, it behoved him to present himself in Soho, and there declare his noble mind."
• (transitive, formal) To be in the best interest of; to benefit.
  "Seeing by the late alliance termed the Rhenish Confederacy, that Louis, King of France, has the most cunning and diabolic intentions on the Imperial Crown, thereby behoving all Germans to unite in a band of brotherhood."
• (intransitive, formal) To be needful, meet or becoming.
  "It behooved that the Sonne of God suld descend unto us, and tak himselfe a bodie of our bodie, flesh of our flesh, and bone of our bones, and so become the Mediator betwixt God and man, giving power to so many as beleeve in him, to be the sonnes of God; […]"