Attendant — Defs

01 a. Being present, or in the train; accompanying; in waiting.

1.
Being present, or in the train; accompanying; in waiting.
“From the attendant flotilla rang notes triumph.” — Sir W. Scott.

“Cherub and Seraph . . . attendant on their Lord.” — Milton.
2.
Accompanying, connected with, or immediately following, as consequential; consequent; as, intemperance with all its attendant evils.
“The natural melancholy attendant upon his situation added to the gloom of the owner of the mansion.” — Sir W. Scott.
3.
Depending on, or owing duty or service to; as, the widow attendant to the heir.(Law)

Phrases & compounds

Attendant keys — the keys or scales most nearly related to, or having most in common with, the principal key; those, namely, of its fifth above, or dominant, its fifth below (fourth above), or subdominant, and its relative minor or major.

02 n. One who attends or accompanies in any character whatever, as a friend, companion, servant, agent, or suitor.

1.
One who attends or accompanies in any character whatever, as a friend, companion, servant, agent, or suitor.
2.
One who is present and takes part in the proceedings; as, an attendant at a meeting.
3.
That which accompanies; a concomitant.
“[A] sense of fame, the attendant of noble spirits.” — Pope.
4.
One who owes duty or service to, or depends on, another.(Law)