(obsolete) Rich in herds (of cattle etc.).

The amount that constitutes a herd.

(transitive, idiomatic, US) To supervise a group of people and their work.

(Internet, computer security) A large collection of compromised systems exploited for malicious purposes.

(idiomatic, in similes) To attempt to control the uncontrollable. / Used other than figuratively or idiomatically: see herd, cat.

(sociology) herding instinct.

(sociology) the tendency of a group of individuals (a herd) to react coherently without there being any coordination between them. The term may be applied to animals, or to human phenomena such as stock market bubbles and behaviour in political demonstrations.

plural of herd immunity

A stud boar, a male pig kept for breeding.

Alternative form of share-herd