add by mixing or blending on or attaching; "work in the butter and the dough will get the right consistency"; "In his speech, the presidential candidate worked in a lot of learned words"
lengthen in time; cause to be or last longer; "We prolonged our stay"; "She extended her visit by another day"; "The meeting was drawn out until midnight"
lengthen or extend in duration or space; "We sustained the diplomatic negotiations as long as possible"; "prolong the treatment of the patient"; "keep up the good work"
the procedure that is varied in order to estimate a variable's effect by comparison with a control condition
an assumption on which rests the validity or effect of something else
(usually plural) a statement of what is required as part of an agreement; "the contract set out the conditions of the lease"; "the terms of the treaty were generous"
a mode of being or form of existence of a person or thing; "the human condition"
a state at a particular time; "a condition (or state) of disrepair"; "the current status of the arms negotiations"
the state of (good) health (especially in the phrases `in condition' or `in shape' or `out of condition' or `out of shape')
apply conditioner to in order to make smooth and shiny; "I condition my hair after washing it"