Of inferior quality, poor, mean. Often said of clothing, food, dwelling, etc. Obsolete.

Of middle position, middle-class, middling.

Of a thing: undistinguished, unremarkable, common, mean. Now rare.

Ordinary, common, mean (in the depreciatory sense of these epithets); base; of inferior quality or value; of little account. (Cf. also coarsely, adv.)

figurative. Having no distinctive character, vividness, or intensity; lacking in interest; bland.

Of adequate or acceptable quality; sufficient; satisfactory. In later use: just good enough to be acceptable.

Not much above or below the average; moderate, mediocre, middling. Moderate in amount, or in degree of excellence; tolerable, mediocre. Later used…

Not definitely possessing either of two opposite qualities; esp. (in later use), Neither good nor bad; of neutral quality.

Having no special or outstanding qualities; not exceptionally gifted or cultured; simple, ordinary, unsophisticated.

Of things. In predicative use.

Of middling quality; neither bad nor good, average; (hence contextually) indifferent, of poor quality, second-rate. Used chiefly of literary or…

Of the usual kind; such as is usually experienced; not singular or exceptional. Often in depreciatory use: not above, or somewhat below, the…

Without fame or renown; undistinguished.

Only moderately good; mediocre, second-rate.

Of a middle ranking; mediocre, second-rate.

= ordinary, adj.; commonplace, inferior, unpleasant; (now) esp. mean, cantankerous, contrary.

Somewhat so-so; rather indifferent.

Having no distinctive character. rare.

betwixt and between n. colloquial and dialect in an intermediate or middling position; neither one thing nor the other. Also as adj.: Middling…

Characterized by indifference.

Devoid of character or expression; lacking distinctive qualities, traits, or characteristics; empty.

(un-, prefix1 affix 4.)

Without a device (in various senses: see the noun). Also, against which no device avails.

(un-, prefix1 affix 1.)

(Esp. at Winchester College) ordinary, commonplace.

Of an ordinary or undistinguished type or quality; average, mediocre; mundane.

Adequate or satisfactory, but worthy of no stronger praise or recommendation; (just) good enough for the purpose.

Of a thing, situation, etc.: dull, poor, undistinguished. colloquial.

consisting or tasting chiefly of (bland) luncheon meat; also figurative, commonplace, mediocre, unexciting.

So so, middling(ly).

Plain, basic, conventional; (esp. of a computer, program, or other product) having no interesting or unusual feature; safe, unadventurous. Used…

Mediocre; unexceptional, uninspiring; (also) unenthusiastic.