Verb

(involv)

To roll or fold up; to wind round; to entwine.

* (John Milton)

Some of serpent kind involved / Their snaky folds.

To envelop completely; to surround; to cover; to hide; to involve in darkness or obscurity.

* (John Milton)

And leave a singèd bottom all involved / With stench and smoke.

To complicate or make intricate, as in grammatical structure.

* (John Locke)

Involved discourses.

*{{quote-book, year=1963, author=(Margery Allingham), title=(The China Governess)

, chapter=17 citation , passage=The face which emerged was not reassuring. […]. He was not a mongol but there was a deficiency of a sort there, and it was not made more pretty by a latter-day hair cut which involved eccentrically long elf-locks and oiled black curls.}}

To connect with something as a natural or logical consequence or effect; to include necessarily; to imply.

* (John Milton)

He knows / His end with mine involved .

* Tillotson

The contrary necessarily involves a contradiction.

*{{quote-magazine, year=2013, month=July-August, author= Sarah Glaz

, title= Ode to Prime Numbers , volume=101, issue=4, magazine=(American Scientist) , passage=Some poems, echoing the purpose of early poetic treatises on scientific principles, attempt to elucidate the mathematical concepts that underlie prime numbers. Others play with primes’ cultural associations. Still others derive their structure from mathematical patterns involving primes.}}

To take in; to gather in; to mingle confusedly; to blend or merge.

* (Alexander Pope)

The gathering number, as it moves along, / Involves a vast involuntary throng.

* (John Milton)

Earth with hell / To mingle and involve .

To envelop, enfold, entangle, or embarrass.

To engage thoroughly; to occupy, employ, or absorb.

* Sir (Walter Scott)

Involved in a deep study.

(mathematics) To raise to any assigned power; to multiply, as a quantity, into itself a given number of times.

Verb

(ambitransitive) To come between, or to be between, persons or things.

The Mediterranean intervenes between Europe and Africa.

* De Quincey

self-sown woodlands of birch, alder, etc., intervening the different estates

To occur, fall, or come between, points of time, or events; as, an instant intervened between the flash and the report; nothing intervened (i.e. between the intention and the execution) to prevent the undertaking.

To interpose; as, to intervene to settle a quarrel; get involved, so as to alter or hinder an action

(legal) In a suit to which one has not been made a party, to put forward a defense of one's interest in the subject matter.

(Abbott)