What exactly counts as self harm?

Any form of deliberate self injury counts as self harm. The most common forms of self harm are cutting and burning, although there are other forms e.g skin-picking, scratching, bruising on purpose etc

Anything you do to purposely harm yourself. Such as cutting, burning, scratching biting, hitting, breaking your own bones, giving yourself a rug burn, exc. Just anything to hurt yourself on purpose. Thats where the term "Self Harm" comes from.

I believe that self harm counts as anything that could possibly inflict pain towards you. Whether it'd be physical or emotional. You could do self-mutilation to your body , take an overdose of pills or be listening to music that causes emotional pain.

Anything that is intentionally meant to harm you, and is inflicted by you. This can range from physical, to emotional, to socially

Any wound self inflicted on purpose. This includes scratching, hair pulling, pitching, punching, cutting, burning, hitting, and many other things. Although cutting is a type of self-harm, it isn't the only type. Just as people come in all shapes and sizes, self-harm does, as well. So anything that involves harming yourself on purpose in anyway, counts as self-harm.

Self harm can take many forms, many many forms. It could be cutting yourself (not necessarily with a knife or a blade, anything that cuts counts), or burning yourself in any way, starving yourself, or eating way beyond being full, it can be depriving yourself of sleep, getting yourself in stressful situations, getting yourself in dangerous situations such as wondering alone at night on dangerous streets, it can also be biting yourself, hitting yourself, or even trying to get hurt by someone else, it can be staying with someone toxic for you even though you know you shouldn't, or also being self depreciating...self harm takes many many forms

Being angry to our own self counts already as a simple self harm. In life there are many things that could make us harm ourselves, but remember that there are also good and amazing things life has to offer.

Self harm would be anything that you do that could potentially cause harm to yourself. There's a misconception that just cutting would be self harm and that alternatives to self harm could be burning, rubber bands, etc. It could not be more wrong. They cause harm to yourself and they cause you pain. They are not an alternative to self harm in the slightest and tend to make recovery harder.

Anything that someone does deliberate that causes them harm physically/emotionally or mentally is classed as self harm

I don't that there is an exact definition but it is often regarded as intentional self-injury "SI", (cutting and burning are probably the most common) without suicidal intent. It does have an official (DSM-V) label - "Non-Suicidal Self-Injury" (NSSI) but privately I am sceptical about that. In the SI support community it is seen as a way of coping. Helping people who SI to understand why they have chosen SI as a way of coping is probably more constructive than focusing on the physical details.