1) Brush 2) Dental care 3) The act of brushing your hair 
• (p. pr. & vb. n.) of Brush • (a.) Constructed or used to brush with; as a brushing machine. • (a.) Brisk; light; as, a brushing gallop.
A gaiting fault, when parallel pasterns are so close that the legs brush in passing.
To clear the trail corridor of plants, trees, and branches, which could impede the progress of trail users.
(from the article `agricultural technology`) Brushing is a frost-protection technique in which shields of paper or aluminum foil are set up to reduce radiation loss to the sky; it has been used ...
Digging up the bottom or taking down the top to give more headroom in roadways.
And ... (12 Dec 1998) ... 
Brushing the teeth is part of an individual's daily home dental care. Patients with braces should follow the orthodontist's instruction on how often to brush.
Brush'ing adjective 1. Constructed or used to brush with; as a brushing machine. 2. Brisk; light; as, a brushing gallop. 
Digging up the bottom or taking down the top to give more headroom in roadways.
A gaiting fault, when parallel pasterns are so close that the legs brush in passing.