abeam

Short definition from Wiktionary

Adverb

1. 1
   On the beam; at a right angle to the centerline or keel of a vessel or aircraft; being at a bearing approximately 090 Degrees or 270 Degrees relative.
2. 2
   Alongside or abreast; opposite the center of the side of the ship or aircraft.

Adjective

1. 1
   Alongside or abreast; opposite the center of the side of the ship or aircraft.
2. 2
   Beaming, shining (especially with reference to a person's face or eyes).

Preposition

1. 1
   Alongside.