What does binding mean?
Binding functions both as a noun and an adjective. As a noun, it most commonly denotes the cover that holds a book's pages together — as in hardcover or paperback binding — as well as a strip of fabric sewn along the edge of a garment or rug to reinforce or trim it, and, in skiing, the mechanism that attaches a boot to a ski. As an adjective, binding describes agreements, contracts, promises, or decisions that carry formal or legal obligation: a binding treaty commits its signatories and cannot simply be set aside. The word conveys constraint and permanence, which is why negotiators distinguish carefully between binding and nonbinding commitments. Its figurative reach extends to phrases like "binding obligation" and "binding precedent." Derived from the verb bind, it evokes the physical act of tying or fastening, making it a vivid example of how concrete actions give rise to abstract legal vocabulary.
The cover of a book that holds its pages together, or the style in which a book is bound.
"The rare first edition still had its original leather binding."
A narrow strip of material sewn over or attached to an edge to strengthen, protect, or decorate it.
"The tailor finished the quilt with a contrasting satin binding."
(Of an agreement, promise, or decision) having legal or formal force; obligatory and enforceable.
"The arbitration panel issued a verdict that was binding on both parties."
The plural applies to the countable noun senses: individual book covers/edge trims, and especially ski bindings.
"He adjusted his ski bindings before heading down the slope."
Sign a binding contract and you're literally 'tied' to it — the word comes from the same ancient root as bandage and bondage.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of binding
Binding comes from the Old English verb bindan, meaning to tie or fasten, which traces back through Proto-Germanic *bindan to the Proto-Indo-European root *bhendh-, also meaning to bind. This ancient root produced cognates across Germanic languages, such as German binden, and related English words including bond, band, bundle, bandage, and bondage. The noun sense referring to a book's cover developed alongside bookbinding as a craft, while the adjectival sense denoting enforceable obligations arose from the metaphorical idea of being tied to one's word.
Related word forms
How binding is actually used
"Binding" is common in legal and formal contexts, where "binding agreement" or "binding decision" signals enforceability. In publishing and crafts it is a neutral technical term. The adjective is frequently negated as "nonbinding" in diplomatic language.
Easily confused with binding
A nonbinding agreement expresses intent but carries no legal force, whereas a binding agreement obligates the parties and can be enforced.