in line

definition: one behind another in a line or queue
example: they waited in line for the tickets
speech part: adverb
synonyms:
definition: being next in an order of succession
example: Since the secretary was in line for the presidency, they had their own security detail.
speech part: adjective
synonyms:
definition: awaiting something
example:
speech part: adjective
synonyms:

How in line is being used?