Give the full meaning of 2 4 in music?

Answer 1

2/4 is an example of a time signature.

The top number tells you how many beats are in the bar, in this example 2.

The bottom of the time signature tells you what type of beats they are: in this case they are crotchet beats because of the 4. 2 on the bottom means minum beats, you can sometimes get 1 for semibreves and 8 is for measuring in quaver beats. These are the most common I think.

If you have 8 on the bottom and the top number is a multiple of 3 I think you tend to count in dotted crotchet beats. You divide the top number by 3 to get the number of dotted crotchet beats per bar. I.e. 9/8 is 3 dotted crotchet beats per bar.

I apologise for going off on a tangent there but hope that's useful too. So, 2/4 means 2 crotchet beats per bar. (It's simple duple time; duple because there are two beats in a bar and simple because they are crotchet beats. Dotted crotchet beats would make it compound).