plus-minus, adverb
- Origin:
- Afrikaans, British EnglishShow more The full written form of the spoken interpretation of ±, shorthand for ‘more or less’; perhaps reinforced by Afrikaans plus-minus; according to the OED, long obsolete in British English.
‘More or less’, about, approximately; used of area, number, time, amount, age, etc.
c1970 C. Desmond Discarded People 46The extent of living quarters must be restricted to approximately 1/8th morgen (plus-minus 10,000 sq. ft.).
1992 Weekend Post 20 June 9He expected ‘plus-minus 1 000 files’ would eventually be forwarded for ‘possible prosecution’.
‘More or less’, about, approximately; used of area, number, time, amount, age, etc.

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