ADJECTIVE (2)

1. being next in a line of succession;
- Example: "he was in line for the presidency"

2. awaiting something; especially something due;
- Example: "people were in line at the checkout counter"
- Example: "she was in line for promotion"


ADVERB (1)

1. one behind another in a line or queue;
- Example: "they waited in line for the tickets"

WordNet (r) 3.0 (2006):

in line
    adv 1: one behind another in a line or queue; "they waited in
           line for the tickets"
    adj 1: being next in a line of succession; "he was in line for
           the presidency"
    2: awaiting something; especially something due; "people were in
       line at the checkout counter"; "she was in line for
       promotion"