Document ID: ./input/supremecourt_opinions/opinions/19pdf/17-1618_hfci.pdf
Page Number: 100

Cite as:  590 U. S. ____ (2020) 

63 

ALITO, J., dissenting
Appendix B to opinion of ALITO, J. 

conduct. 5. coitus. 6. to have sex, Informal. to engage in
sexual intercourse. –v.t. 7. to ascertain the sex of, esp. of 
newly hatched chicks. 8.  sex  it  up, Slang. to neck pas-
sionately: They were really sexing it up last night. 9. sex 
up, Informal. a. to arouse sexually: She certainly knows 
how  to  sex  up  the  men.  b.  to  increase  the  appeal  of;  to
make more interesting, attractive, or exciting: We’ve de-
cided to sex up the movie with some battle scenes. [ME <
L sex(us), akin to secus, deriv. of secāre to cut, divide; see 
SECTION] 

American Heritage Dictionary 1187 (1969): 

sex (sĕks) n. 1. a. The property or quality by which organ-
isms are classified according to their reproductive func-
tions. b. Either of two divisions, designated male and fe-
male,  of  this  classification.  2.  Males  or  females  collec-
tively.  3.  The  condition  or  character  of  being  male  or 
female;  the  physiological,  functional,  and  psychological
differences that distinguish the male and the female. 4. 
The sexual urge or instinct as it manifests itself in behav-
ior.  5.  Sexual  intercourse.  –tr.v.  sexed,  sexing,  sexes.
To  determine  the  sex of  (young  chickens).  [Middle  Eng-
lish, from Old French sexe, from Latin sexus†.] 

B 

Webster’s  Third  New  International  Dictionary  2081 
(2002): 

1sex \‘seks\ n –ES often attrib [ME, fr. L sexus; prob. akin
to L secare to cut—more at  SAW] 1:  one of the two divi-
sions  of  organic  esp.  human  beings  respectively  desig-
nated male or female <a member of the opposite ~> 2: the 
sum  of  the morphological,  physiological,  and behavioral