The 25-year old has penned a two-and-a-half-year deal with the Dons following his release from League One club Oldham Athletic.
"There were other clubs keen to take him and it's great that he wants to be part of what we're doing here at Aberdeen.
"I've said all along that I'll only bring in players who I believe will add something to the squad and Adam certainly ticks that box."
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