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Definition of greylock
greylock
/ˈɡreɪˌlɑːk/
grey · lock
Plural:greylocks
greylock Lexical Profile
CEFR
C1
Grade
8
Tier
3
Usage
Rare
• noun
1
American The highest natural point in the U.S. state of Massachusetts, located in the northern Berkshire region and noted for its prominent peak and surrounding state reservation.
2
A lock, tress, or streak of grey hair.
Example
"The elder statesman brushed a stray greylock from his forehead before continuing his address."
• Nearby Words
Word Origin & Etymology
Primarily derived from Chief Gray Lock (also spelled Greylock or Wawanotewat), a prominent 18th-century Western Abenaki leader, whose English name literally translates to a lock of grey hair. The notable Massachusetts mountain is named in his honor.
Usage Trend
Historical frequency of usage in published text.
180019102020
Data source: Google Books Ngram Viewer
Cite this Entry
Wordmom. (2026). Definition of Greylock. In Wordmom Dictionary. Retrieved Oct 17, 2026, from https://wordmom.com/dictionary/greylock