the mind > emotion > love > friendliness > [noun] > state of being acquainted > acquaintance > slight acquaintance (3)
The action of inclining the body or head in salutation, etc.; the making of an obeisance; also attributive, as in bowing acquaintance.
(a) a slight acquaintance (with a person or thing); (b) a person with whom one has a slight acquaintance.
terms of slight acquaintance; esp. in to be on nodding terms (with).