on the qui vive |
on the lookout; alert; watchful. |
on the rebound |
just after the bounce of a ball or the like. [2 definitions] |
on the road |
traveling, esp. as a salesperson, performer, or theatrical company. |
on the rocks |
in a state of financial ruin. [2 definitions] |
on the shelf |
inactive or unused; put aside; reserved for future use or consideration. |
on the sly |
secretly; stealthily. |
on the spot |
at once; immediately. [2 definitions] |
on the spur of the moment |
without much thought; on a sudden impulse. |
on the upgrade |
improving, rising, or gaining importance. |
on the uptake |
in understanding, realizing, or grasping. |
on the wagon |
(informal) refraining from drinking alcohol. |
on the warpath |
seeking, preparing for, or fighting in a war or warlike conflict. [2 definitions] |
on the whole |
all things considered; in general; for the most part. |
on the wrong tack |
pursuing an inappropriate or mistaken course of action; misguided. |
ontic |
having true and ultimate existence. |
on time |
at the correct time for an event that is planned. |
on tiptoe |
standing or walking on the toes, esp. to proceed quietly or cautiously. [2 definitions] |
onto |
to a position on or on top of. [2 definitions] |
onto- |
existence; being. [2 definitions] |
ontogeny |
the process of biological growth and development of a particular living organism. (Cf. phylogeny.) |
ontological |
of or pertaining to the philosophical study of existence and the nature of reality. |