herd instinct

noun

: an inherent tendency to congregate or to react in unison

herd instinct of wild horses

the startled cows obeyed the herd instinct to stampede

especially : a theoretical human instinct toward gregariousness and conformity

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now