(acronym) Rigid inflatable boat — A lightweight inflatable boat with a rigid hull. / (Internet) routing information base

(anatomy) Any of a series of long curved bones occurring in 12 pairs in humans and other animals and extending from the spine to or toward the sternum.

(botany) Hound's-tongue (Cynoglossum officinale). / (botany) Costmary (Tanacetum balsamita). / (botany) Watercress (Nasturtium officinale).

To shape, support, or provide something with a rib or ribs. / To tease or make fun of someone in a good-natured way. / To enclose, as if with ribs, and protect; to shut in.

(uncountable) The action of the verb to rib; teasing. / (countable, uncountable) A rib, or the collective ribs, on an object. / (countable) An instance of teasing.

present participle of rib

simple past tense and past participle of rib

Having ribs. / (mining) intercalated with slate; said of a seam of coal.

plural of ribbing

plural of rib