is water consider an acid?

So far, all the other answers are not correct.

Water can act as an acid and it can act as a base - we call molecules that can do this : amphoteric

Water undergoes what is called auto-ionization - it performs an acid/base reaction with itself:

H2O + H2O ------> H3O+ + OH-

One water molecule gives a proton to a second water molecule. The one giving the proton away can be called an acid by some definitions. The second water molecule taking the Hydrogen can be termed a base.

Overall, water is neutral because the reaction immediately reverses itself - but this reaction is always taking place in water.

If you put water in the presence of a strong base such as NaOH, then water becomes an acid - giving its proton to the OH- from the NaOH. Of course, the water is just forming more OH- - but its still acting like an acid.

When talking about substances that "release" hydrogen ions - you are talking about the Bronsted-Lowery Acid/Base definition.

no cuz water has a pH of 7,which is neutral.

No, water is perfectly neutral.

Water is amphoteric meaning that it is able to act as an acid or a base. If water is added to a base, it will donate one of its hydrogen atoms to function as an acid and then become OH-. If it is added to a acid, it will accept a hydrogen atom to become H3O+. Water is normally neutral on its own because there are no protons to donate or accept when all molecules have full valence shells but it will form hydrogen bonds which give water the tension on the surface and heavy weight.

Hope this answers your question.

"any substance that releases hydrogen ions"
Water doesn't release hydrogen ions when it's put in itself.

In its pure state, water is neutral, but water that falls as rain becomes slightly acidic as it travels through the air and absorbs ions

no, water is neutral. your theory is one way of looking at acids and bases. remember that water also releases oxygen ions. bases release oxygen in the form of OH- ions.