|adj./adv. empty, hollow; lacking substance, impractical; for nothing, in vain||
|char. sky, air||
phr. If you have time, you're welcome to go and have some fun.
phr. vacancy, vacant room
adj./n. idle; leisure, spare time
n. free time, spare time
phr. I missed you very much recently, give me a call if you are free.
n. vacant land, open space
phr. have time; be free
phr. (spoken) be unavailable; (of someone) to have no time