mainline

[meyn-lahyn, -lahyn] / ˈmeɪnˌlaɪn, -ˈlaɪn /

ADJECTIVE

principal

Synonyms

STRONGEST

dominant key leading main major outstanding paramount predominant preeminent primary prime prominent

STRONG

arch capital cardinal champion chief essential first head maximum premier sovereign star superior

WEAK

controlling crowning foremost greatest highest incomparable matchless peerless prevailing second to none stellar strongest supereminent supreme transcendent unapproachable unequaled unparalleled unrivaled

Antonyms

STRONGEST

inconspicuous inessential inferior insignificant last lesser minor nonessential ordinary secondary subordinate trivial unimportant unknown

STRONG

auxiliary least lower poor

WEAK

extra

VERB

inject

Synonyms

STRONGEST

vaccinate

STRONG

inoculate jab shoot

WEAK

give a shot

Antonyms

WEAK

take out

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The service is installed on more than 300 of those planes but just 18 of its mainline jets.

From The Wall Street Journal • Apr. 1, 2026

The tax burden would be disproportionately felt by progressive mainline Protestant churches, Black evangelical churches and immigrant-majority Catholic and Protestant congregations, not to mention immigrant-majority mosques and temples.

From Salon • Nov. 16, 2025

The 04:28 Avanti West Coast service came off the tracks on the West Coast mainline at Shap in Cumbria on Monday morning after travelling at speeds of 80mph.

From BBC • Nov. 4, 2025

With that guidance, officials canceled plans to transfer most of the inmates to mainline prisons.

From The Wall Street Journal • Oct. 11, 2025

Meanwhile, evangelical Protestants are pulling closer to their mainline counterparts in class and education.

From "Class Matters" by The New York Times

mainline

Example Sentences

Related Words