- [Astron] The tenth sign of zodiac, into which the sun enters at the winter solstice, about December 21. See Tropic."The sun was entered into Capricorn." [Dryden.]
- [Astron] A southern constellation, represented on ancient monuments by the figure of a goat, or a figure with its fore part like a fish.
Etymology: L. capricornus; caper goat + cornu horn: cf. F. capricorne