1. Noun

   armpit; under one's arm; side; flank

   彼がブリーフケースを脇に抱えてやってくるのが見えた。

2. beside; close to; near; by

   also written as 傍, 側

3. aside; to the side; away; out of the way

4. off-track; off-topic

5. deuteragonist; supporting role

   usu. written ワキ in Noh

6. second verse (in a linked series of poems)

   Abbreviationsee 脇句

Also written 腋【わき】waki、掖【わき】waki