One who shares interests or activities with another
One that accompanies another
One of a matched pair of things
To be with or go with (another)
One who accompanies another
She gave her companion an angry glance.
"Are you taking me as your companion?" she asked.
The countess was sitting with her companion Belova, playing grand- patience as usual, when Pierre and Natasha came into the drawing room with parcels under their arms.
He sensed the entrance of another before his companion spoke.
His gaze settled on Jade's familiar features, and he studied his companion of so many years.