very large in scale, scope, or capability.
of or pertaining to macroeconomics.
noun, plural macros.
anything very large in scale, scope, or capability.
Photography. a macro lens.
Also called macroinstruction. Computers. an instruction that represents a sequence of instructions in abbreviated form.

independent use of macro-, taken as an adjective, or by shortening of words with macro- as initial element Unabridged


a combining form meaning “large,” “long,” “great,” “excessive,” used in the formation of compound words, contrasting with micro-: macrocosm; macrofossil; macrograph; macroscopic.
Also, especially before a vowel, macr-.

< Greek makro-, combining form of makrós long; cognate with Latin macer lean; see meager

macro-, micro-. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
macro (ˈmækrəʊ)
n , pl macros
1.  a macro lens
2.  Also: macro instruction a single computer instruction that initiates a set of instructions to perform a specific task

macro- or (before a vowel) macr-
combining form
1.  large, long, or great in size or duration: macroscopic
2.  Compare micro- (in pathology) indicating abnormal enlargement or overdevelopment: macrocyte
3.  producing larger than life images: macrophotography
[from Greek makros large; compare Latin macermeagre]
macr- or (before a vowel) macr-
combining form
[from Greek makros large; compare Latin macermeagre]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

comb. form meaning "long," from Gk. makros "long, large," from PIE base *mak-/*mek- "long, thin" (cf. L. macer "lean, thin;" O.N. magr, O.E. mæger "lean, thin;" Gk. mekos "length," makros "long").

in computing sense, 1959, from macroinstruction, from macro- + instruction.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

macro- or macr-

  1. Large: macronucleus.

  2. Long: macrobiotic.

  3. Inclusive: macroamylase.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
A prefix meaning "large," as in macromolecule, a large molecule.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Computing Dictionary

MACRO definition

1. Assembly language for VAX/VMS.
2. PL/I-like language with extensions for string processing. "MACRO: A Programming Language", S.R. Greenwood, SIGPLAN Notices 14(9):80-91 (Sep 1979).
[Jargon File]

macro definition

A name (possibly followed by a formal argument list) that is equated to a text or symbolic expression to which it is to be expanded (possibly with the substitution of actual arguments) by a macro expander.
The term "macro" originated in early assemblers, which encouraged the use of macros as a structuring and information-hiding device. During the early 1970s, macro assemblers became ubiquitous, and sometimes quite as powerful and expensive as HLLs, only to fall from favour as improving compiler technology marginalised assembly language programming (see languages of choice). Nowadays the term is most often used in connection with the C preprocessor, Lisp, or one of several special-purpose languages built around a macro-expansion facility (such as TeX or Unix's troff suite).
Indeed, the meaning has drifted enough that the collective "macros" is now sometimes used for code in any special-purpose application control language (whether or not the language is actually translated by text expansion), and for macro-like entities such as the "keyboard macros" supported in some text editors (and PC TSRs or Macintosh INIT/CDEV keyboard enhancers).
The Free On-line Dictionary of Computing, © Denis Howe 2010
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American Heritage
Abbreviations & Acronyms
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
If your digital camera includes what's known as macro mode, you might be able
  to get better shots at close range.
Macro econ modelers have attempted many times to do it and have failed
They think that the world is a solid place with macro occurrences, whereas some
  of us support the notion of energies.
So creative compared to the usual macro insect images.
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