[] to formally promise to give or do sth保证；正式承诺；立誓◆Japan has pledged $100 million in aid.日本已承诺提供 1 亿元援助。◆The CEO pledged that there would be no more job cuts.首席执行官保证不会再裁员。 () to leave sth valuable with sb to prove that you will pay back money that you owe抵押；担保◆The shares were pledged to the bank as security for loans.这些股票作为贷款的担保抵押给了银行。