Senses
雁行 v-formation of geese
The neat, orderly formation of wild geese in flight
雁行 brothers
(literary) A metaphor for brothers or the order of seniority among brothers
雁行 to walk single file
(literary) To walk in a line or follow in sequence
雁行 orderly arrangement
(literary) Arranged in a neat, orderly line or sequence, or the manner of younger people following behind their elders in a line