To dream of a guard represents you or someone else that is cautious or wary of something. A cautious attitude towards change or interference. An inability to “get through” to someone or an unwillingness to open up to others. An emotional guard or barrier.
Negatively, a guard may also reflect feelings about something in your life “keeping you out” or keeping you away from something. Feeling that something is too exclusive or special for you. Feeling that you need to meet certain conditions before being allowed to do something. It may also reflect a sense of danger you feel stepping over a line in a relationship or situation.
Alternatively, a guard may reflect you or someone else that is “on guard” or very alert about a situation.