With reference to a limit of time; as, in an hour; it
happened in the last century; in all my life.

With privilege or possession; – used to denote a holding,
possession, or seisin; as, in by descent; in by purchase; in of the
seisin of her husband.

With reference to a whole which includes or comprises the
part spoken of; as, the first in his family; the first regiment in the
army.

With reference to movement or tendency toward a certain
limit or environment; – sometimes equivalent to into; as, to put seed
in the ground; to fall in love; to end in death; to put our trust in
God.

With reference to physical surrounding, personal states,
etc., abstractly denoted; as, I am in doubt; the room is in darkness;
to live in fear.

With reference to circumstances or conditions; as, he is in
difficulties; she stood in a blaze of light.

The specific signification of in is situation or place with
respect to surrounding, environment, encompassment, etc. It is used
with verbs signifying being, resting, or moving within limits, or
within circumstances or conditions of any kind conceived of as
limiting, confining, or investing, either wholly or in part. In its
different applications, it approaches some of the meanings of, and
sometimes is interchangeable with, within, into, on, at, of, and among.

e. içine, içinde, -de, -da. The cups are in the cupboard. (Fincanlar dolaptadır.)

With reference to space or place; as, he lives in Boston; he
traveled in Italy; castles in the air.

With reference to character, reach, scope, or influence
considered as establishing a limitation; as, to be in one’s favor.