Definitions
from The American Heritage® Dictionary of the English Language, 4th Edition
 n. Mathematics.
from Wiktionary, Creative Commons Attribution/ShareAlike License
 n. A mowing; what is gathered from mowing.
 n. Short for mathematics.
 n. Arithmetic calculations; (see do the math).
 n. A math course.
 n. Short for matha.
from the GNU version of the Collaborative International Dictionary of English
 n. A mowing, or that which is gathered by mowing;  chiefly used in composition.
from The Century Dictionary and Cyclopedia
 n. A mowing, or what is gathered from mowing.
 n. An abbreviation of mathematics and mathematical.
 n. An abbreviation of mathematician.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
 n. a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement
Etymologies
Examples

The only way to be strong in math is to put the time in.
Steven Levitt, Arnold Kling  EconLog  Library of Economics and Liberty

Colloquially we say “four hundred and sixtythree,” for example, but the convention in math is that “and” stands for a decimal: 463 is “four hundred sixtythree”, 4.63 is “four AND sixtythree hundreths.”

He holds a bachelor's degree in math from the University of Delhi and an MBA in marketing and finance from the Indian Institute of ManagementAhmedabad.

The total PhD number for blacks in math is often in the single digits nationwide.
The Volokh Conspiracy » A Department That Doesn’t Look Like America

Very little math is happening in math classes today, but then the WASL requires very little basic math.

A survey of middleschool girls reveals that their selfconfidence in math suffers when their parents believe the gender stereotype that holds that math is a male domain and when the parents give unsolicited help with homework.

If getting higher scores in math is 'smart' then maybe South Indians would trump North Indians.

I should not admit that Luke is following an unjustifiable archaism in using the term mathētai so frequently in Acts. [690] Is not a restriction of the idea voiced as early as Matt.x. 42 (hos an potisē hena tōn mikrōn toutōn potērion psuchroō monon eis onoma mathētou)?
The Mission and Expansion of Christianity in the First Three Centuries

She "calulated," her math is as bad as her english.

If my math is accurate, they receive an average of six stories per day, which means five out of six hit the cutting room floor.
mary.marcotte commented on the word math
math v. to solve a problem using mathematics. The only way I can math these numbers is by using a calculator.
June 2, 2016