1. see someone's true position or intention despite what they present
don't lie to me, I can see right through you
When you see right through somebody, it means you acknowledge the true intention or ability of someone, despite their intention to have you believe something else. When you see through someone you perceive beyond their outward persona or mask to their true feelings or intentions. Do not confuse this with the phrase 'to look right through someone', which means to ignore them or dismiss their presence.