scalable

Etymology

It is formed from English scale + -able.^{[2][3][4][5][6]} The verb is the one meaning to climb, which the OED also uses for measuring or changing something by a scale;^[2][3] it comes from the noun scale, a ladder, from Italian scala or Latin scāla (“ladder, flight of stairs”),^[2] from an earlier *scanslā, from scandō (“to climb”),^[2][3] from Proto-Indo-European *skand- (“to spring, leap, climb”).^[3]

Earliest recorded meaning

Able to be climbed: 1579–80, in Thomas North's translation of Plutarch's Lives, of a wall "easily scalable with ladders".^[2][7] Merriam-Webster Unabridged dates it to about 1580,^[4] Dictionary.com to 1570–80.^[6]

Semantic evolution

The climbing sense is now rare.^[2][5] In 1936 the word took the new sense "able to be measured or graded according to a scale", in the journal Psychological Monographs,^[2][3][7] and the noun scalability followed by 1944.^[8] In 1977 it is recorded for "able to be changed in scale".^[2][5] Merriam-Webster's Collegiate of 2003 already gave the computing sense, of a system or network that can easily be expanded or upgraded as needed,^[9][4] and in the 1980s it came to mean able to increase greatly in capacity with relative ease.^[1]

Timeline

• 1579 – able to be climbed.^[2][7]
• 1936 – able to be measured or graded on a scale.^[2][3]
• 1977 – able to be changed in scale.^[2][5]

Meanings

Adjective

1. Of a computer system, network or business, able to be expanded or upgraded easily as demand grows: The start-up built a scalable platform from the first day.^[4][9]
2. Able to be climbed.^[4][2][5]
3. Able to be measured or graded according to a scale.^[2][5]
4. (rare) Able to be changed in scale; resizable.^[2][5]

Word family

• scalability
• scalableness
• scalably

Related words

• scale
• escalade
• escalate
• ascend
• descend
• scan

Usage notes

Grammarphobia notes that in business writing the word is sometimes used loosely, as in asking whether one company's approach is scalable, apparently meaning that other companies could use it.^[7]

References

1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f g h i j k l m n Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
3. ^ a b c d e f Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
4. ^ a b c d e Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
5. ^ a b c d e f g Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
6. ^ a b Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
7. ^ a b c d O'Conner, Patricia T.; Kellerman, Stewart, The Grammarphobia Blog, grammarphobia.com, p. "Is Berkshire’s approach scalable?", 28 May 2014
8. ^ Simpson, J. A.; Weiner, E. S. C., eds. (1989), The Oxford English Dictionary, 2nd ed., Oxford: Clarendon Press
9. ^ a b Merriam-Webster's Collegiate Dictionary (2003), 11th ed., Springfield, Mass.: Merriam-Webster