space

1 space /ˈspeɪs/ noun
plural spaces
1 space
/ˈspeɪs/
noun
plural spaces
Britannica Dictionary definition of SPACE
1 
a  [noncount] : the amount of an area, room, surface, etc., that is empty or available for use
— see also a waste of space at 1waste
b  : an area that is used or available for a specific purpose
[count]
[noncount]
2 
a  : an empty area between things
[count]
[noncount]
b  : an area of land with no buildings on it
[plural]
[noncount]
3 
[noncount] : the region beyond the Earth's atmosphere in which there are stars and planets : outer space — often used before another noun
4 
[noncount] : the limitless area in which all things exist and move
5 
[count] : a period of time — usually singular
6 
a  : a blank area separating written or printed words or lines
[count]
[noncount]
b  : a blank part or section on a document where something can be written
[count]
[noncount]
7 
[noncount]
a  : the freedom and time to behave and think as you want to without being controlled or influenced by someone else
8 
[count] : an available seat on a bus, train, etc.

stare/gaze (off) into space

: to look straight ahead without looking at anything specific
2 space /ˈspeɪs/ verb
spaces; spaced; spacing
2 space
/ˈspeɪs/
verb
spaces; spaced; spacing
Britannica Dictionary definition of SPACE
[+ object]
1 
: to place or arrange (things) so that there is a particular amount of space between them
— often + out
2 
: to separate (things) by particular periods of time
— often + out

space out

[phrasal verb] informal
: to stop paying attention : to become unaware of what is happening around you