inf.

Of lower quality

“Anna had always felt inferior to her brother due to poor school grades.”

Of lower rank

“an inferior officer”

Located below

Situated below some other organ; said of a calyx when free from the ovary, and therefore below it, or of an ovary with an adherent and therefore inferior calyx.

On the side of a flower which is next to the bract; anterior.

Nearer to the Sun than the Earth is.

“the inferior or interior planets; an inferior conjunction of Mercury or Venus”

Below the horizon.

“the inferior part of a meridian”

(grammar) the infinitive mood or mode (a grammatical mood)

(grammar) A non-finite verb form considered neutral with respect to inflection; depending on language variously found used with auxiliary verbs, in subordinate clauses, or acting as a gerund, and often as the dictionary form.

(grammar) A verbal noun formed from the infinitive of a verb.

Not formal or ceremonious.

“an informal get-together”

Not in accord with the usual regulations.

“an informal agreement”

Suited for everyday use.

“informal clothes”

(of language) Reflecting everyday, non-ceremonious usage.

Not organized; not structured or planned.