Ch

noun

1. A series of interconnected rings or links usually made of metal.

   "He wore a gold chain around the neck."

2. A series of interconnected things.

   "This led to an unfortunate chain of events."

3. A series of stores or businesses with the same brand name.

   "That chain of restaurants is expanding into our town."

4. A number of atoms in a series, which combine to form a molecule.

   "When examined, the molecular chain included oxygen and hydrogen."

5. A series of interconnected links of known length, used as a measuring device.