an agreement that a person must keep to, especially one that has force in law; the document containing such an agreement

binder or fastener

a grey powder (made by burning lime and clay) which, after being wetted, becomes hard like stone and is used for building etc

gluing, binding material

a kind of liquid substance used for sticking things

adhesive

(to put on) one of a pair of metal rings joined by a chain, fastened round a prisoner's wrist

bond

stringed musical instrument (14th to 17th centuries) associated with poets and poetry

gluing, binding material