Is approve a word in the Scrabble Dictionary

Yes, approve is playable

...and is worth 17 points.

Found in the following dictionaries

Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)

"Approve" Definition

verb-transitive

Obsolete To prove or attest.
To consent to officially or formally; confirm or sanction: The Senate approved the treaty.
To consider right or good; think or speak favorably of.

verb

To have or express a favorable opinion of .
To accept as satisfactory .
To give formal or official sanction to .
To take a favorable view .