ETYM Pref. in- not + formal.
1. Not formal.
2. Not officially recognized or controlled; SYN. loose.
3. Used of spoken and written language.

(Homonym: lacks)
1. Not taut or rigid; not stretched or held tight.
2. Emptying easily or excessively; SYN. loose.
3. Lacking in rigor or strictness; SYN. slack.
4. (Phonetics) Pronounced with muscles relatively relaxed (e.g., the vowel sound in 'bet').

1. Not bound or fastened or gathered together
2. Not carefully arranged in a package
3. Not fixed firmly or tightly
4. Not restrained or confined or attached
5. Not tense or taut; SYN. slack.
6. Not compact or dense in structure or arrangement
7. Not tight; not closely constrained or constricted or constricting
8. (Of a ball in sport) Not in the possession or control of any player
9. (Of textures) Full of small openings or gaps; SYN. open.
10. Freely producing mucus + prikaži više

In a permissively lenient manner; SYN. leniently.

1. In a loose manner.
2. In a relaxed manner; not rigid; SYN. slackly.
3. Knitted in a loose manner.

Informally, in a manner that is not strict; calmly, while free of anxiety