ETYM Latin intellectualis: cf. French intellectuel.
1. Appealing to or using the intellect.
2. Associated with or requiring the use of the mind; SYN. rational.
3. Of or relating to the intellect.

1. Of or relating to the mind
2. Involving the mind or an intellectual process
3. Affected by a disorder of the mind
4. (Biology) Of or relating to the chin- or lip-like structure in insects and certain mollusks.
5. Of or relating to the chin

ETYM Latin spiritualis: cf. French spirituel. Related to Spirit.
1. Concerned with or affecting the spirit or soul; SYN. unearthly.
2. Lacking material body or form or substance.

In one's mind.

In a spiritual manner.