From Longman Dictionary of Contemporary Englishtrue to your word/principles etctrue to your word/principles etcBEHAVEbehaving in the way you said you would or according to principles which you believe in He was true to his word and said nothing about it to Lisa. → true
Examples from the Corpus
true to your word/principles etc• A man true to his word.• The captain was true to his word.• The Characters A young girl: Lazy but true to her word.• Otto had been true to his word and left out for me a pair of boy's shorts.• We have been true to our word and true to our mission because of your skill and professionalism.• But true to his word, before I left, my uncle gave me help.• Jim, true to his word, may be the man to fix it after all. 