a sharp protuberance
a dead tree that is still standing, usually in an undisturbed forest; a snag can provide food and a habitat for insects and birds'
an opening made forcibly as by pulling apart; there was a rip in his pants; she had snags in her stockings
an unforeseen obstacle
catch on a snag; I snagged my stocking'
get by acting quickly and smartly; snag a bargain'