81st
Follows the eightieth
Eighty-first in a sequence.
The 81st item follows the 80th and precedes the 82nd: Her 81st birthday, the 81st Congress, 81st Airborne Division.
Like other ordinals, it marks position rather than quantity.
Nine times nine
- numericalRelating to figures
- sequenceOrdered succession of elements
- positionLocation or stance
- rankingOrdered position assignment
placement · eightieth · eighty-second · order · numbering · counting · listing · indexing
Splitting into parts
- regimentColonel-led military unit
- brigadeLarge military unit
- airborneTraveling through air
- infantryGround combat troops
battalion · unit · corps · squadron · army · combat · veterans · deployment
Festive event marking occasion
- commemorationAct of honoring memory
- milestoneNotable event marking progress
- jubileeSpecial anniversary observance
- ceremonyFormal event marking occasions
birthday · founding · establishment · dedication · observance · tribute · memorial · centennial
eighty-one
Nine times nine
ranking · placement · eightieth · eighty-second · order · numbering · counting · listing · indexing · enumeration
division
Splitting into parts
infantry · battalion · unit · corps · squadron · army · combat · veterans · deployment · formation
celebration
Festive event marking occasion
- commemorationAct of honoring memory
- milestoneNotable event marking progress
- jubileeSpecial anniversary observance
ceremony · birthday · founding · establishment · dedication · observance · tribute · memorial · centennial · diamond