Meaning of “bond” - Learner’s Dictionary

bond

noun [ C ] uk us /bɒnd/
CONNECTION

B2 an interest, experience, or feeling that makes two people feel connected:

A love of opera created a bond between them.
DOCUMENT

an official document from a government or company to show that you have given them money that they will pay back with a certain amount of extra money

(Definition of “bond noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)