Daisy chain, originally a garland of flowers, with additional uses in the fields of electronic engineering, computer software, rock climbing, backpacking, fishing, the military, and human relations

Chain letter, message that attempts to induce the recipient to make a number of copies of the message and then pass them on to one or more new recipients

Mountain range, a chain of hills or mountains

Chain stitch, in sewing and embroidery, a series of looped stitches that form a chain

Hudson River Chain, one of several chains used in blockades of the Hudson River

Human chain, a form of protest

Chain sequence (continued fraction), numbers in the mathematical study of continued fractions

Chain, Planetary, a chain of globes serving as fields of evolution in theosophical cosmology

Chain smoking, the habit of smoking continuously

Chain of thought, continuous thought process where ideas follow one from the other

Archipelago, a chain of islands

Crater chain, a line of craters on the surface of an astronomical body

Signifying chain, in semiotics, an interlocking system of signifiers