Definitions

1. noun

a unit of time equal to one million years, used in geology

“The new discovery dated back to the meg era.”

2. noun

a unit of measurement for computer memory equal to 1,048,576 bytes

“This new hard drive has a storage capacity of 1 meg.”

3. prefix

very large or enormous

“megafauna refers to very large animals.”

4. abbreviation

used to represent megahertz (MHz), a unit of frequency

“The radio station broadcasts at 101.5 meg.”