What does capitalization mean?
Capitalization is the practice of writing letters in their uppercase, or capital, form — most visibly at the start of sentences, for proper nouns such as people's names and place names, and in titles. Beyond this everyday typographic sense, the word carries important meanings in finance: a company's market capitalization is the combined value of all its shares, a headline figure investors watch constantly, while accountants use capitalization to mean treating a cost as a long-term asset rather than an immediate expense. Derived from 'capital', a Latin-rooted word originally tied to wealth and heads of cattle, capitalization spans two very different domains — the mechanics of written language and the measurement of corporate worth. Its British spelling, capitalisation, differs only in the -ise ending. Mastering its grammatical rules is a mark of careful writing, while understanding its financial sense is essential to reading business news.
The act or system of using capital letters in writing.
"Good capitalization makes a document easier to read and signals attention to detail."
Often discussed in style guides under headings like 'Rules of Capitalization'.
(Finance) The total value of a company's outstanding shares; market capitalization.
"The firm's capitalization climbed past fifty billion dollars after the product launch."
Frequently shortened informally to 'market cap'.
(Finance/Accounting) Recording an expenditure as an asset rather than an expense, or converting income into capital.
"The company chose to capitalize development costs, extending capitalization over several years."
In accounting contexts, often paired with depreciation schedules.
Rarely used in the plural; each sense typically appears as a singular mass noun. Plural forms appear mainly in technical or comparative discussions of different companies' market values.
"Analysts compared the capitalizations of the two rival firms side by side."
Every company on the stock market has one number that sums up its entire worth — its 'market capitalization' — and it can change by billions before you finish reading this sentence.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of capitalization
Capitalization derives from 'capitalize', formed from 'capital', which entered English from Latin 'capitalis', meaning 'of the head', itself from 'caput' ('head'). The Latin root also gave rise to words like 'cattle' and 'per capita'. The financial sense grew naturally from the idea of converting value into capital, while the writing sense reflects the visual prominence of capital letters. The -ize/-ise suffix pattern reflects Greek-derived verb formation adopted through French and Latin scholarly tradition.
Related word forms
How capitalization is actually used
In British English the spelling is 'capitalisation' with -s-. In typography and editing contexts, terms like 'sentence case' and 'title case' describe specific capitalization conventions. In finance, 'market cap' is the common informal shortening.
Easily confused with capitalization
Capitalisation is simply the British spelling of the same word, with -ise instead of -ize.
Capitulation means surrendering or giving in, while capitalization concerns either letter casing or financial capital.