| back and forth |
moving backward then forward, or forward then backward, often repeatedly. [2 definitions] |
| back burner |
a state of temporary low priority (usu. prec. by "on the"). |
| back formation |
in linguistics, a word that appears to be the base of, but was actually formed from, another word, as "trivia" from "trivial". |
| back number |
any previous issue of a periodical. |
| back order |
part of an order that will be filled at a later date. |
| back out of |
to withdraw from prematurely. [2 definitions] |
| back road |
(often pl.) a country road or local road that avoids traffic as well as high speed travel. |
| back seat |
a seat or seating area behind other seats, esp. of a vehicle. |
| back talk |
insolent replies or retorts; impudence. |
| back up |
to create and store a copy of (a computer file), often in a separate location, in case the original is damaged or lost. [8 definitions] |
| back-order |
to submit an order for (something) to be filled at a later time, as when (it) is available. |
| back-pedal |
to press backward on the pedals of a bicycle or tricycle in order to brake. [3 definitions] |
| back-seat driver |
a passenger who gives unsolicited advice about driving to the driver. |
| back-step |
a step taken backwards. [2 definitions] |
| back-talk |
(informal) to answer in an insolent manner. |
| back-to-back |
following immediately after another; in consecutive order. [2 definitions] |
| behind one's back |
when one is not present; secretly. |
| bounce back |
to recover completely or quickly. |
| bring back |
to reintroduce (something from the past). [3 definitions] |
| call back |
to continue a telephone conversation with (someone) at a later time, or to return someone's telephone call. |