passing

1 passing /ˈpæsɪŋ/ Brit /ˈpɑːsɪŋ/ noun
1 passing
/ˈpæsɪŋ/ Brit /ˈpɑːsɪŋ/
noun
Britannica Dictionary definition of PASSING
[noncount]
1 
: the act of moving toward and beyond something — usually + of
2 
— used to talk about the movement of time — usually + of
3 
formal : a person's death
4 
: the act of officially approving a bill, law, etc.

in passing

: in a brief way while discussing something else
2 passing /ˈpæsɪŋ/ Brit /ˈpɑːsɪŋ/ adjective
2 passing
/ˈpæsɪŋ/ Brit /ˈpɑːsɪŋ/
adjective
Britannica Dictionary definition of PASSING
always used before a noun
1 
: moving past someone or something
2 
— used to talk about time that is going past
3 
: lasting for only a short time
4 
: done or made quickly
5 
: not very strong or thorough : slight
6 
: showing that you completed a test or class in an acceptable way
7 
sports : relating to the skill of throwing, hitting, or kicking a ball or puck to a teammate